./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/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_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/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_e1273b69-12ef-46e5-addf-61879bf2a0bd/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 16b6a38408403620534e0fd3420fc5cec7a59a0b00c704b760a1c7da59bda35b --- 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 10:00:02,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:00:02,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:00:02,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:00:02,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:00:02,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:00:02,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:00:02,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:00:02,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:00:02,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:00:02,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:00:02,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:00:02,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:00:02,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:00:02,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:00:02,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:00:02,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:00:02,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:00:02,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:00:02,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:00:02,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:00:02,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:00:02,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:00:02,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:00:02,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:00:02,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:00:02,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:00:02,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:00:02,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:00:02,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:00:02,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:00:02,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:00:02,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:00:02,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:00:02,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:00:02,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:00:02,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:00:02,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:00:02,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:00:02,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:00:02,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:00:02,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:00:02,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:00:02,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:00:02,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:00:02,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:00:02,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:00:02,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:00:02,364 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:00:02,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:00:02,364 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:00:02,364 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:00:02,364 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:00:02,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:00:02,365 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:00:02,365 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:00:02,365 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:00:02,365 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:00:02,365 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:00:02,365 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:00:02,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:00:02,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:00:02,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:00:02,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:00:02,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:00:02,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:00:02,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:00:02,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:00:02,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:00:02,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:00:02,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:00:02,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:00:02,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:00:02,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:00:02,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:00:02,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:00:02,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:00:02,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:00:02,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:00:02,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:00:02,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:00:02,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:00:02,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:00:02,368 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_e1273b69-12ef-46e5-addf-61879bf2a0bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16b6a38408403620534e0fd3420fc5cec7a59a0b00c704b760a1c7da59bda35b [2022-12-14 10:00:02,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:00:02,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:00:02,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:00:02,548 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:00:02,548 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:00:02,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c [2022-12-14 10:00:05,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:00:05,471 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:00:05,471 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c [2022-12-14 10:00:05,504 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/data/2359c1532/899e2f40862e4224be4a9b3c4fd3b380/FLAG056f823af [2022-12-14 10:00:05,617 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/data/2359c1532/899e2f40862e4224be4a9b3c4fd3b380 [2022-12-14 10:00:05,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:00:05,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:00:05,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:00:05,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:00:05,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:00:05,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:00:05" (1/1) ... [2022-12-14 10:00:05,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9642dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:05, skipping insertion in model container [2022-12-14 10:00:05,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:00:05" (1/1) ... [2022-12-14 10:00:05,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:00:05,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:00:07,097 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_e1273b69-12ef-46e5-addf-61879bf2a0bd/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c[380593,380606] [2022-12-14 10:00:07,116 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_e1273b69-12ef-46e5-addf-61879bf2a0bd/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c[383339,383352] [2022-12-14 10:00:07,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:00:07,323 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:00:08,120 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_e1273b69-12ef-46e5-addf-61879bf2a0bd/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c[380593,380606] [2022-12-14 10:00:08,123 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_e1273b69-12ef-46e5-addf-61879bf2a0bd/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-2.c[383339,383352] [2022-12-14 10:00:08,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:00:08,168 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:00:08,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08 WrapperNode [2022-12-14 10:00:08,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:00:08,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:00:08,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:00:08,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:00:08,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,526 INFO L138 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 13030 [2022-12-14 10:00:08,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:00:08,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:00:08,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:00:08,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:00:08,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,812 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:00:08,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:00:08,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:00:08,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:00:08,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (1/1) ... [2022-12-14 10:00:08,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:00:08,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:08,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:00:08,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:00:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:00:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 10:00:08,921 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 10:00:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 10:00:08,921 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 10:00:08,921 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 10:00:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 10:00:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 10:00:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 10:00:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 10:00:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 10:00:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 10:00:08,922 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 10:00:08,922 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 10:00:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 10:00:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:00:08,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:00:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:00:09,029 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:00:09,031 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:00:14,464 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:00:15,858 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:00:15,859 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 10:00:15,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:00:15 BoogieIcfgContainer [2022-12-14 10:00:15,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:00:15,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:00:15,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:00:15,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:00:15,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:00:05" (1/3) ... [2022-12-14 10:00:15,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67631d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:00:15, skipping insertion in model container [2022-12-14 10:00:15,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:08" (2/3) ... [2022-12-14 10:00:15,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67631d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:00:15, skipping insertion in model container [2022-12-14 10:00:15,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:00:15" (3/3) ... [2022-12-14 10:00:15,868 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.09.cil-2.c [2022-12-14 10:00:15,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:00:15,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 10:00:15,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:00:15,954 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;@25671680, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:00:15,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 10:00:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 10:00:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:00:15,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:15,976 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] [2022-12-14 10:00:15,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash 273644314, now seen corresponding path program 1 times [2022-12-14 10:00:15,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:15,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938893603] [2022-12-14 10:00:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:16,308 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 10:00:16,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:16,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938893603] [2022-12-14 10:00:16,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938893603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:16,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:16,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:00:16,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315883537] [2022-12-14 10:00:16,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:00:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:00:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:00:16,348 INFO L87 Difference]: Start difference. First operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 10:00:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:17,040 INFO L93 Difference]: Finished difference Result 3745 states and 7279 transitions. [2022-12-14 10:00:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:00:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 59 [2022-12-14 10:00:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:17,057 INFO L225 Difference]: With dead ends: 3745 [2022-12-14 10:00:17,057 INFO L226 Difference]: Without dead ends: 1940 [2022-12-14 10:00:17,063 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 10:00:17,065 INFO L413 NwaCegarLoop]: 3428 mSDtfsCounter, 3688 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3688 SdHoareTripleChecker+Valid, 6768 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:17,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3688 Valid, 6768 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:00:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-12-14 10:00:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1939. [2022-12-14 10:00:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1881 states have (on average 1.9298245614035088) internal successors, (3630), 1885 states have internal predecessors, (3630), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 10:00:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3716 transitions. [2022-12-14 10:00:17,180 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3716 transitions. Word has length 59 [2022-12-14 10:00:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:17,180 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 3716 transitions. [2022-12-14 10:00:17,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 10:00:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3716 transitions. [2022-12-14 10:00:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:00:17,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:17,190 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:17,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:00:17,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1021994501, now seen corresponding path program 1 times [2022-12-14 10:00:17,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:17,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677066095] [2022-12-14 10:00:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:00:17,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:17,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677066095] [2022-12-14 10:00:17,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677066095] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:17,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448079907] [2022-12-14 10:00:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:17,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:17,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:17,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:00:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:00:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:00:17,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:00:17,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448079907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:17,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:00:17,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:00:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070188183] [2022-12-14 10:00:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:17,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:00:17,605 INFO L87 Difference]: Start difference. First operand 1939 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 10:00:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:18,023 INFO L93 Difference]: Finished difference Result 2518 states and 4609 transitions. [2022-12-14 10:00:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 116 [2022-12-14 10:00:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:18,034 INFO L225 Difference]: With dead ends: 2518 [2022-12-14 10:00:18,034 INFO L226 Difference]: Without dead ends: 2225 [2022-12-14 10:00:18,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 10:00:18,037 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3461 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:18,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3493 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-12-14 10:00:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2219. [2022-12-14 10:00:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2113 states have (on average 1.882158069096072) internal successors, (3977), 2118 states have internal predecessors, (3977), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 10:00:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 4135 transitions. [2022-12-14 10:00:18,115 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 4135 transitions. Word has length 116 [2022-12-14 10:00:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:18,115 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 4135 transitions. [2022-12-14 10:00:18,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 10:00:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 4135 transitions. [2022-12-14 10:00:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:00:18,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:18,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:18,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:00:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 10:00:18,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -312302397, now seen corresponding path program 1 times [2022-12-14 10:00:18,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:18,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002015827] [2022-12-14 10:00:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:18,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:00:18,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002015827] [2022-12-14 10:00:18,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002015827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:18,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529335271] [2022-12-14 10:00:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:18,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:18,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:18,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:00:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:18,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:00:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 10:00:18,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:00:18,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529335271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:18,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:00:18,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:00:18,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070033792] [2022-12-14 10:00:18,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:18,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:18,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:18,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:18,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:00:18,805 INFO L87 Difference]: Start difference. First operand 2219 states and 4135 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 10:00:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:19,188 INFO L93 Difference]: Finished difference Result 3352 states and 5878 transitions. [2022-12-14 10:00:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:19,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 116 [2022-12-14 10:00:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:19,201 INFO L225 Difference]: With dead ends: 3352 [2022-12-14 10:00:19,201 INFO L226 Difference]: Without dead ends: 2779 [2022-12-14 10:00:19,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 10:00:19,206 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 3473 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:19,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 3492 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2022-12-14 10:00:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2771. [2022-12-14 10:00:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2571 states have (on average 1.8121353558926487) internal successors, (4659), 2578 states have internal predecessors, (4659), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 10:00:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4957 transitions. [2022-12-14 10:00:19,288 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4957 transitions. Word has length 116 [2022-12-14 10:00:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:19,288 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 4957 transitions. [2022-12-14 10:00:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 10:00:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4957 transitions. [2022-12-14 10:00:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:00:19,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:19,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:19,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 10:00:19,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 10:00:19,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1789703809, now seen corresponding path program 1 times [2022-12-14 10:00:19,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:19,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236845556] [2022-12-14 10:00:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:19,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:00:19,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236845556] [2022-12-14 10:00:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236845556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541807446] [2022-12-14 10:00:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:19,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:19,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:19,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:19,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:00:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:00:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 10:00:19,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:00:19,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541807446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:19,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:00:19,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:00:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663069346] [2022-12-14 10:00:19,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:19,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:00:19,760 INFO L87 Difference]: Start difference. First operand 2771 states and 4957 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 10:00:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:20,145 INFO L93 Difference]: Finished difference Result 4996 states and 8366 transitions. [2022-12-14 10:00:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:20,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 116 [2022-12-14 10:00:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:20,157 INFO L225 Difference]: With dead ends: 4996 [2022-12-14 10:00:20,157 INFO L226 Difference]: Without dead ends: 3871 [2022-12-14 10:00:20,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 10:00:20,162 INFO L413 NwaCegarLoop]: 3293 mSDtfsCounter, 3479 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3480 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:20,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3479 Valid, 3480 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2022-12-14 10:00:20,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3859. [2022-12-14 10:00:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3475 states have (on average 1.7263309352517986) internal successors, (5999), 3486 states have internal predecessors, (5999), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-12-14 10:00:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 6569 transitions. [2022-12-14 10:00:20,254 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 6569 transitions. Word has length 116 [2022-12-14 10:00:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:20,255 INFO L495 AbstractCegarLoop]: Abstraction has 3859 states and 6569 transitions. [2022-12-14 10:00:20,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 10:00:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 6569 transitions. [2022-12-14 10:00:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:00:20,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:20,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:20,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:00:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:20,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash -716832321, now seen corresponding path program 1 times [2022-12-14 10:00:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:20,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944378660] [2022-12-14 10:00:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:00:20,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944378660] [2022-12-14 10:00:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944378660] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149058497] [2022-12-14 10:00:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:20,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:20,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:20,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:00:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:20,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:00:20,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 10:00:20,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:00:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149058497] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:20,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:00:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:00:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044515770] [2022-12-14 10:00:20,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:00:20,727 INFO L87 Difference]: Start difference. First operand 3859 states and 6569 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 10:00:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:21,196 INFO L93 Difference]: Finished difference Result 8236 states and 13242 transitions. [2022-12-14 10:00:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 116 [2022-12-14 10:00:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:21,218 INFO L225 Difference]: With dead ends: 8236 [2022-12-14 10:00:21,218 INFO L226 Difference]: Without dead ends: 6023 [2022-12-14 10:00:21,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 10:00:21,226 INFO L413 NwaCegarLoop]: 3303 mSDtfsCounter, 3482 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3490 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:21,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 3490 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6023 states. [2022-12-14 10:00:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6023 to 6003. [2022-12-14 10:00:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 5259 states have (on average 1.641186537364518) internal successors, (8631), 5278 states have internal predecessors, (8631), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-12-14 10:00:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 9729 transitions. [2022-12-14 10:00:21,361 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 9729 transitions. Word has length 116 [2022-12-14 10:00:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:21,361 INFO L495 AbstractCegarLoop]: Abstraction has 6003 states and 9729 transitions. [2022-12-14 10:00:21,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 10:00:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 9729 transitions. [2022-12-14 10:00:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:00:21,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:21,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:21,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:00:21,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:21,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -633272895, now seen corresponding path program 1 times [2022-12-14 10:00:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503531879] [2022-12-14 10:00:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:21,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:00:21,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503531879] [2022-12-14 10:00:21,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503531879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212398716] [2022-12-14 10:00:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:21,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:21,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:21,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:00:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:00:21,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 10:00:21,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:00:21,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212398716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:21,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:00:21,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:00:21,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907233668] [2022-12-14 10:00:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:21,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:21,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:00:21,938 INFO L87 Difference]: Start difference. First operand 6003 states and 9729 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 10:00:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:22,497 INFO L93 Difference]: Finished difference Result 14620 states and 22794 transitions. [2022-12-14 10:00:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 116 [2022-12-14 10:00:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:22,542 INFO L225 Difference]: With dead ends: 14620 [2022-12-14 10:00:22,542 INFO L226 Difference]: Without dead ends: 10263 [2022-12-14 10:00:22,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 10:00:22,560 INFO L413 NwaCegarLoop]: 3269 mSDtfsCounter, 3467 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3467 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:22,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3467 Valid, 3456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2022-12-14 10:00:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 10227. [2022-12-14 10:00:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10227 states, 8779 states have (on average 1.5718191137942819) internal successors, (13799), 8814 states have internal predecessors, (13799), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-12-14 10:00:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10227 states to 10227 states and 15921 transitions. [2022-12-14 10:00:22,863 INFO L78 Accepts]: Start accepts. Automaton has 10227 states and 15921 transitions. Word has length 116 [2022-12-14 10:00:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:22,863 INFO L495 AbstractCegarLoop]: Abstraction has 10227 states and 15921 transitions. [2022-12-14 10:00:22,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 10:00:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10227 states and 15921 transitions. [2022-12-14 10:00:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:00:22,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:22,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:22,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:00:23,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:00:23,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1441971711, now seen corresponding path program 1 times [2022-12-14 10:00:23,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:23,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564498243] [2022-12-14 10:00:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:23,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 10:00:23,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564498243] [2022-12-14 10:00:23,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564498243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:23,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:23,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:00:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343110174] [2022-12-14 10:00:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:23,255 INFO L87 Difference]: Start difference. First operand 10227 states and 15921 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:00:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:23,803 INFO L93 Difference]: Finished difference Result 16919 states and 26164 transitions. [2022-12-14 10:00:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2022-12-14 10:00:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:23,849 INFO L225 Difference]: With dead ends: 16919 [2022-12-14 10:00:23,849 INFO L226 Difference]: Without dead ends: 12499 [2022-12-14 10:00:23,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:23,859 INFO L413 NwaCegarLoop]: 3355 mSDtfsCounter, 100 mSDsluCounter, 3261 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:23,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6616 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2022-12-14 10:00:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 11811. [2022-12-14 10:00:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11811 states, 10299 states have (on average 1.5946208369744634) internal successors, (16423), 10334 states have internal predecessors, (16423), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 10:00:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11811 states to 11811 states and 18609 transitions. [2022-12-14 10:00:24,138 INFO L78 Accepts]: Start accepts. Automaton has 11811 states and 18609 transitions. Word has length 116 [2022-12-14 10:00:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:24,138 INFO L495 AbstractCegarLoop]: Abstraction has 11811 states and 18609 transitions. [2022-12-14 10:00:24,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 10:00:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 11811 states and 18609 transitions. [2022-12-14 10:00:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:00:24,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:24,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:24,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:00:24,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1502727786, now seen corresponding path program 1 times [2022-12-14 10:00:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:24,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601495062] [2022-12-14 10:00:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 10:00:24,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:24,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601495062] [2022-12-14 10:00:24,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601495062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:24,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:24,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:00:24,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702579420] [2022-12-14 10:00:24,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:24,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:24,215 INFO L87 Difference]: Start difference. First operand 11811 states and 18609 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:24,911 INFO L93 Difference]: Finished difference Result 31852 states and 49370 transitions. [2022-12-14 10:00:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 10:00:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:24,973 INFO L225 Difference]: With dead ends: 31852 [2022-12-14 10:00:24,973 INFO L226 Difference]: Without dead ends: 21687 [2022-12-14 10:00:24,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:24,995 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3469 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:24,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3469 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21687 states. [2022-12-14 10:00:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21687 to 21587. [2022-12-14 10:00:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21587 states, 18635 states have (on average 1.5527233700026832) internal successors, (28935), 18702 states have internal predecessors, (28935), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-12-14 10:00:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21587 states to 21587 states and 33169 transitions. [2022-12-14 10:00:25,561 INFO L78 Accepts]: Start accepts. Automaton has 21587 states and 33169 transitions. Word has length 157 [2022-12-14 10:00:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:25,562 INFO L495 AbstractCegarLoop]: Abstraction has 21587 states and 33169 transitions. [2022-12-14 10:00:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 21587 states and 33169 transitions. [2022-12-14 10:00:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:00:25,590 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:25,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:25,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:00:25,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash -82406166, now seen corresponding path program 1 times [2022-12-14 10:00:25,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:25,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053402896] [2022-12-14 10:00:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 10:00:25,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053402896] [2022-12-14 10:00:25,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053402896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:25,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:25,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:00:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327479537] [2022-12-14 10:00:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:25,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:25,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:25,682 INFO L87 Difference]: Start difference. First operand 21587 states and 33169 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:26,887 INFO L93 Difference]: Finished difference Result 60892 states and 93082 transitions. [2022-12-14 10:00:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 10:00:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:26,972 INFO L225 Difference]: With dead ends: 60892 [2022-12-14 10:00:26,972 INFO L226 Difference]: Without dead ends: 40951 [2022-12-14 10:00:27,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:27,011 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3471 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:27,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40951 states. [2022-12-14 10:00:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40951 to 40755. [2022-12-14 10:00:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40755 states, 34987 states have (on average 1.5239660445308256) internal successors, (53319), 35118 states have internal predecessors, (53319), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-12-14 10:00:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40755 states to 40755 states and 61521 transitions. [2022-12-14 10:00:28,077 INFO L78 Accepts]: Start accepts. Automaton has 40755 states and 61521 transitions. Word has length 157 [2022-12-14 10:00:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:28,077 INFO L495 AbstractCegarLoop]: Abstraction has 40755 states and 61521 transitions. [2022-12-14 10:00:28,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40755 states and 61521 transitions. [2022-12-14 10:00:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:00:28,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:28,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:28,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:00:28,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1212642530, now seen corresponding path program 1 times [2022-12-14 10:00:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413292227] [2022-12-14 10:00:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:28,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 10:00:28,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413292227] [2022-12-14 10:00:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413292227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:28,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:28,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:00:28,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550692007] [2022-12-14 10:00:28,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:28,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:28,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:28,187 INFO L87 Difference]: Start difference. First operand 40755 states and 61521 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:30,338 INFO L93 Difference]: Finished difference Result 117820 states and 178138 transitions. [2022-12-14 10:00:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 10:00:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:30,525 INFO L225 Difference]: With dead ends: 117820 [2022-12-14 10:00:30,525 INFO L226 Difference]: Without dead ends: 78711 [2022-12-14 10:00:30,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:30,603 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3473 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:30,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78711 states. [2022-12-14 10:00:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78711 to 78323. [2022-12-14 10:00:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78323 states, 67051 states have (on average 1.5034376817646269) internal successors, (100807), 67310 states have internal predecessors, (100807), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-12-14 10:00:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78323 states to 78323 states and 116689 transitions. [2022-12-14 10:00:33,201 INFO L78 Accepts]: Start accepts. Automaton has 78323 states and 116689 transitions. Word has length 157 [2022-12-14 10:00:33,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:33,201 INFO L495 AbstractCegarLoop]: Abstraction has 78323 states and 116689 transitions. [2022-12-14 10:00:33,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 78323 states and 116689 transitions. [2022-12-14 10:00:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:00:33,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:33,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:00:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:00:33,310 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -279640898, now seen corresponding path program 1 times [2022-12-14 10:00:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383669033] [2022-12-14 10:00:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 10:00:33,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:33,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383669033] [2022-12-14 10:00:33,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383669033] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:33,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:33,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:00:33,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103052330] [2022-12-14 10:00:33,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:33,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:33,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:33,369 INFO L87 Difference]: Start difference. First operand 78323 states and 116689 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:37,917 INFO L93 Difference]: Finished difference Result 229372 states and 343514 transitions. [2022-12-14 10:00:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 10:00:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:38,385 INFO L225 Difference]: With dead ends: 229372 [2022-12-14 10:00:38,385 INFO L226 Difference]: Without dead ends: 152695 [2022-12-14 10:00:38,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:00:38,588 INFO L413 NwaCegarLoop]: 3292 mSDtfsCounter, 3476 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3476 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:38,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3476 Valid, 3479 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152695 states. [2022-12-14 10:00:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152695 to 151923. [2022-12-14 10:00:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151923 states, 129899 states have (on average 1.4874864317662184) internal successors, (193223), 130414 states have internal predecessors, (193223), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 10:00:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151923 states to 151923 states and 223953 transitions. [2022-12-14 10:00:43,043 INFO L78 Accepts]: Start accepts. Automaton has 151923 states and 223953 transitions. Word has length 157 [2022-12-14 10:00:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:43,044 INFO L495 AbstractCegarLoop]: Abstraction has 151923 states and 223953 transitions. [2022-12-14 10:00:43,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:00:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 151923 states and 223953 transitions. [2022-12-14 10:00:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 10:00:43,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:43,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:00:43,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:00:43,318 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 36538250, now seen corresponding path program 1 times [2022-12-14 10:00:43,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:43,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370529742] [2022-12-14 10:00:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 10:00:43,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:43,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370529742] [2022-12-14 10:00:43,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370529742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:43,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132499688] [2022-12-14 10:00:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:43,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:43,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:43,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:43,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:00:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:00:43,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 10:00:43,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:00:43,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132499688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:43,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:00:43,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:00:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133295159] [2022-12-14 10:00:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:43,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:00:43,755 INFO L87 Difference]: Start difference. First operand 151923 states and 223953 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:00:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:48,792 INFO L93 Difference]: Finished difference Result 229115 states and 342487 transitions. [2022-12-14 10:00:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:00:48,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 179 [2022-12-14 10:00:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:49,177 INFO L225 Difference]: With dead ends: 229115 [2022-12-14 10:00:49,178 INFO L226 Difference]: Without dead ends: 152439 [2022-12-14 10:00:49,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:00:49,321 INFO L413 NwaCegarLoop]: 3413 mSDtfsCounter, 198 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 6658 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:49,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 6658 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:00:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152439 states. [2022-12-14 10:00:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152439 to 151411. [2022-12-14 10:00:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151411 states, 129387 states have (on average 1.4735869909650892) internal successors, (190663), 129902 states have internal predecessors, (190663), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 10:00:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151411 states to 151411 states and 221393 transitions. [2022-12-14 10:00:54,513 INFO L78 Accepts]: Start accepts. Automaton has 151411 states and 221393 transitions. Word has length 179 [2022-12-14 10:00:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:54,513 INFO L495 AbstractCegarLoop]: Abstraction has 151411 states and 221393 transitions. [2022-12-14 10:00:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:00:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 151411 states and 221393 transitions. [2022-12-14 10:00:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 10:00:54,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:54,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:00:54,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:00:54,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:54,984 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1037092424, now seen corresponding path program 1 times [2022-12-14 10:00:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:54,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669423712] [2022-12-14 10:00:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 10:00:55,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669423712] [2022-12-14 10:00:55,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669423712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:00:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353414344] [2022-12-14 10:00:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:55,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:00:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:55,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:00:55,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:00:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:55,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:00:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:00:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 10:00:55,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:00:55,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353414344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:55,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:00:55,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:00:55,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031310538] [2022-12-14 10:00:55,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:55,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:00:55,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:00:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:00:55,394 INFO L87 Difference]: Start difference. First operand 151411 states and 221393 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:01:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:00,353 INFO L93 Difference]: Finished difference Result 268273 states and 385230 transitions. [2022-12-14 10:01:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:01:00,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 10:01:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:00,816 INFO L225 Difference]: With dead ends: 268273 [2022-12-14 10:01:00,816 INFO L226 Difference]: Without dead ends: 192365 [2022-12-14 10:01:00,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:01:00,967 INFO L413 NwaCegarLoop]: 3282 mSDtfsCounter, 3477 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:00,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3336 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:01:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192365 states. [2022-12-14 10:01:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192365 to 192365. [2022-12-14 10:01:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192365 states, 167273 states have (on average 1.418358013546717) internal successors, (237253), 167788 states have internal predecessors, (237253), 16388 states have call successors, (16388), 8703 states have call predecessors, (16388), 8702 states have return successors, (16386), 15874 states have call predecessors, (16386), 16386 states have call successors, (16386) [2022-12-14 10:01:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192365 states to 192365 states and 270027 transitions. [2022-12-14 10:01:07,143 INFO L78 Accepts]: Start accepts. Automaton has 192365 states and 270027 transitions. Word has length 179 [2022-12-14 10:01:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:07,144 INFO L495 AbstractCegarLoop]: Abstraction has 192365 states and 270027 transitions. [2022-12-14 10:01:07,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:01:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 192365 states and 270027 transitions. [2022-12-14 10:01:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 10:01:07,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:07,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:01:07,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:01:07,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 10:01:07,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1339371523, now seen corresponding path program 1 times [2022-12-14 10:01:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:07,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40086216] [2022-12-14 10:01:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 10:01:07,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:07,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40086216] [2022-12-14 10:01:07,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40086216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:01:07,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590153896] [2022-12-14 10:01:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:07,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:07,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:01:07,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:01:07,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:01:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:01:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:01:08,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:01:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590153896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:08,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:01:08,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 10:01:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574941240] [2022-12-14 10:01:08,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:08,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:01:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:01:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:01:08,181 INFO L87 Difference]: Start difference. First operand 192365 states and 270027 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 10:01:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:18,754 INFO L93 Difference]: Finished difference Result 584547 states and 817343 transitions. [2022-12-14 10:01:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:01:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 180 [2022-12-14 10:01:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:20,117 INFO L225 Difference]: With dead ends: 584547 [2022-12-14 10:01:20,117 INFO L226 Difference]: Without dead ends: 393829 [2022-12-14 10:01:20,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:01:20,477 INFO L413 NwaCegarLoop]: 3476 mSDtfsCounter, 3507 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 7101 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:20,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 7101 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:01:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393829 states. [2022-12-14 10:01:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393829 to 393313. [2022-12-14 10:01:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393313 states, 343141 states have (on average 1.4061187675037374) internal successors, (482497), 344680 states have internal predecessors, (482497), 32256 states have call successors, (32256), 17403 states have call predecessors, (32256), 17914 states have return successors, (33790), 31230 states have call predecessors, (33790), 32254 states have call successors, (33790) [2022-12-14 10:01:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393313 states to 393313 states and 548543 transitions. [2022-12-14 10:01:33,425 INFO L78 Accepts]: Start accepts. Automaton has 393313 states and 548543 transitions. Word has length 180 [2022-12-14 10:01:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:33,425 INFO L495 AbstractCegarLoop]: Abstraction has 393313 states and 548543 transitions. [2022-12-14 10:01:33,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 10:01:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 393313 states and 548543 transitions. [2022-12-14 10:01:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 10:01:34,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:34,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:01:34,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:01:34,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 10:01:34,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:34,497 INFO L85 PathProgramCache]: Analyzing trace with hash -247552900, now seen corresponding path program 1 times [2022-12-14 10:01:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:34,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116454117] [2022-12-14 10:01:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 10:01:34,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116454117] [2022-12-14 10:01:34,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116454117] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:01:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162831510] [2022-12-14 10:01:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:34,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:01:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:01:34,727 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:01:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:01:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:34,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:01:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:01:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 10:01:34,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:01:34,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162831510] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:34,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:01:34,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:01:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022200402] [2022-12-14 10:01:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:34,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:01:34,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:01:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:01:34,899 INFO L87 Difference]: Start difference. First operand 393313 states and 548543 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:01:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:51,407 INFO L93 Difference]: Finished difference Result 913485 states and 1296548 transitions. [2022-12-14 10:01:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:01:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 180 [2022-12-14 10:01:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:53,233 INFO L225 Difference]: With dead ends: 913485 [2022-12-14 10:01:53,233 INFO L226 Difference]: Without dead ends: 521819 [2022-12-14 10:01:53,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:01:53,969 INFO L413 NwaCegarLoop]: 3281 mSDtfsCounter, 111 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:53,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 6527 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:01:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521819 states. [2022-12-14 10:02:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521819 to 437869. [2022-12-14 10:02:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437869 states, 385643 states have (on average 1.437036326343276) internal successors, (554183), 387184 states have internal predecessors, (554183), 33283 states have call successors, (33283), 18430 states have call predecessors, (33283), 18941 states have return successors, (34817), 32255 states have call predecessors, (34817), 33281 states have call successors, (34817) [2022-12-14 10:02:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437869 states to 437869 states and 622283 transitions. [2022-12-14 10:02:10,610 INFO L78 Accepts]: Start accepts. Automaton has 437869 states and 622283 transitions. Word has length 180 [2022-12-14 10:02:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:10,611 INFO L495 AbstractCegarLoop]: Abstraction has 437869 states and 622283 transitions. [2022-12-14 10:02:10,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 10:02:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 437869 states and 622283 transitions. [2022-12-14 10:02:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 10:02:11,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:11,494 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:02:11,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 10:02:11,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 10:02:11,696 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:02:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash -496825567, now seen corresponding path program 2 times [2022-12-14 10:02:11,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248154083] [2022-12-14 10:02:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 10:02:11,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248154083] [2022-12-14 10:02:11,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248154083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:02:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946552848] [2022-12-14 10:02:11,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:02:11,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:11,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:12,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:12,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:02:12,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:02:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:02:12,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:02:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 10:02:12,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:02:12,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946552848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:02:12,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:02:12,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 10:02:12,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887840528] [2022-12-14 10:02:12,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:02:12,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:02:12,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:02:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:02:12,176 INFO L87 Difference]: Start difference. First operand 437869 states and 622283 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:02:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:30,275 INFO L93 Difference]: Finished difference Result 845679 states and 1213637 transitions. [2022-12-14 10:02:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:02:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 180 [2022-12-14 10:02:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:32,279 INFO L225 Difference]: With dead ends: 845679 [2022-12-14 10:02:32,279 INFO L226 Difference]: Without dead ends: 624363 [2022-12-14 10:02:32,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:02:32,656 INFO L413 NwaCegarLoop]: 3397 mSDtfsCounter, 162 mSDsluCounter, 3262 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 6659 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:32,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 6659 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:02:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624363 states. [2022-12-14 10:02:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624363 to 520813. [2022-12-14 10:02:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520813 states, 464491 states have (on average 1.4774861084498947) internal successors, (686279), 466032 states have internal predecessors, (686279), 35331 states have call successors, (35331), 20478 states have call predecessors, (35331), 20989 states have return successors, (36865), 34303 states have call predecessors, (36865), 35329 states have call successors, (36865) [2022-12-14 10:02:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520813 states to 520813 states and 758475 transitions. [2022-12-14 10:02:53,121 INFO L78 Accepts]: Start accepts. Automaton has 520813 states and 758475 transitions. Word has length 180 [2022-12-14 10:02:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:53,121 INFO L495 AbstractCegarLoop]: Abstraction has 520813 states and 758475 transitions. [2022-12-14 10:02:53,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:02:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 520813 states and 758475 transitions. [2022-12-14 10:02:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 10:02:54,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:54,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:02:54,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:02:54,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:02:54,323 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:02:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 786240223, now seen corresponding path program 1 times [2022-12-14 10:02:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658023238] [2022-12-14 10:02:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:54,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 10:02:54,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:54,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658023238] [2022-12-14 10:02:54,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658023238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:02:54,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619070124] [2022-12-14 10:02:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:54,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:02:54,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:02:54,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:02:54,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:02:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:02:54,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:02:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 10:02:54,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:02:54,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619070124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:02:54,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:02:54,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:02:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476223399] [2022-12-14 10:02:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:02:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:02:54,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:02:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:02:54,763 INFO L87 Difference]: Start difference. First operand 520813 states and 758475 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:03:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:25,167 INFO L93 Difference]: Finished difference Result 1290461 states and 1877817 transitions. [2022-12-14 10:03:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:03:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 181 [2022-12-14 10:03:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:27,413 INFO L225 Difference]: With dead ends: 1290461 [2022-12-14 10:03:27,413 INFO L226 Difference]: Without dead ends: 771295 [2022-12-14 10:03:28,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:03:28,331 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 7323 mSDsluCounter, 6391 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7341 SdHoareTripleChecker+Valid, 9640 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:28,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7341 Valid, 9640 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:03:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771295 states. [2022-12-14 10:04:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771295 to 771291. [2022-12-14 10:04:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771291 states, 687333 states have (on average 1.4683086655231161) internal successors, (1009217), 689642 states have internal predecessors, (1009217), 52477 states have call successors, (52477), 30712 states have call predecessors, (52477), 31479 states have return successors, (54779), 50937 states have call predecessors, (54779), 52475 states have call successors, (54779) [2022-12-14 10:04:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771291 states to 771291 states and 1116473 transitions. [2022-12-14 10:04:05,525 INFO L78 Accepts]: Start accepts. Automaton has 771291 states and 1116473 transitions. Word has length 181 [2022-12-14 10:04:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:05,526 INFO L495 AbstractCegarLoop]: Abstraction has 771291 states and 1116473 transitions. [2022-12-14 10:04:05,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 10:04:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 771291 states and 1116473 transitions. [2022-12-14 10:04:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 10:04:07,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:07,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 10:04:07,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:04:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 10:04:07,281 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1405971097, now seen corresponding path program 1 times [2022-12-14 10:04:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:07,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356250099] [2022-12-14 10:04:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 10:04:07,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:07,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356250099] [2022-12-14 10:04:07,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356250099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:04:07,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480851811] [2022-12-14 10:04:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:07,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:07,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:04:07,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1273b69-12ef-46e5-addf-61879bf2a0bd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:04:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:04:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 10:04:07,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:04:07,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480851811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:07,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:04:07,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 10:04:07,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745070487] [2022-12-14 10:04:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:07,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:04:07,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:04:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:04:07,903 INFO L87 Difference]: Start difference. First operand 771291 states and 1116473 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)