./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI --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 e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- 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-5e519f3 [2022-11-03 04:01:57,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:57,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:57,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:57,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:57,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:57,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:57,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:57,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:57,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:57,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:57,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:57,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:57,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:57,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:57,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:57,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:57,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:57,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:57,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:57,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:57,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:57,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:57,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:57,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:57,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:57,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:57,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:57,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:57,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:57,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:57,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:57,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:57,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:57,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:57,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:57,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:57,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:57,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:57,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:57,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:57,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:01:57,548 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:57,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:57,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:57,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:57,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:57,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:57,553 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:57,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:57,553 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:57,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:01:57,554 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:57,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:57,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:01:57,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:01:57,555 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:57,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:01:57,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:01:57,556 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:01:57,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:57,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:01:57,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:01:57,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:01:57,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:57,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:57,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:57,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:57,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:01:57,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:57,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:57,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:57,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:57,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:57,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:57,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:57,560 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:01:57,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:57,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:57,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:01:57,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:01:57,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:57,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:57,562 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_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2022-11-03 04:01:57,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:57,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:57,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:57,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:57,937 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:57,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2022-11-03 04:01:58,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/data/08d62e829/b89c23e5ed294429986850acded9cb08/FLAG7d55ebb4e [2022-11-03 04:01:58,650 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:58,651 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2022-11-03 04:01:58,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/data/08d62e829/b89c23e5ed294429986850acded9cb08/FLAG7d55ebb4e [2022-11-03 04:01:58,895 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/data/08d62e829/b89c23e5ed294429986850acded9cb08 [2022-11-03 04:01:58,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:58,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:58,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:58,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:58,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:58,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:58" (1/1) ... [2022-11-03 04:01:58,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53894331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:58, skipping insertion in model container [2022-11-03 04:01:58,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:58" (1/1) ... [2022-11-03 04:01:58,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:59,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:59,551 WARN L230 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_6359188e-a0d8-48d4-b060-793252ac7e2c/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2022-11-03 04:01:59,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:59,658 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:59,806 WARN L230 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_6359188e-a0d8-48d4-b060-793252ac7e2c/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2022-11-03 04:01:59,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:59,906 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:59,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59 WrapperNode [2022-11-03 04:01:59,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:59,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:59,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:59,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:59,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:01:59,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,043 INFO L138 Inliner]: procedures = 98, calls = 353, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 937 [2022-11-03 04:02:00,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:00,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:02:00,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:02:00,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:02:00,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,142 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:02:00,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:02:00,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:02:00,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:02:00,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (1/1) ... [2022-11-03 04:02:00,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:00,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:00,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:02:00,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6359188e-a0d8-48d4-b060-793252ac7e2c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:02:00,318 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 04:02:00,318 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 04:02:00,319 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 04:02:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 04:02:00,319 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 04:02:00,319 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 04:02:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 04:02:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 04:02:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 04:02:00,320 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 04:02:00,320 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 04:02:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 04:02:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 04:02:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 04:02:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 04:02:00,321 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 04:02:00,321 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 04:02:00,322 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 04:02:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 04:02:00,322 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 04:02:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:02:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 04:02:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 04:02:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 04:02:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 04:02:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 04:02:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 04:02:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 04:02:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 04:02:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 04:02:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 04:02:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 04:02:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 04:02:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 04:02:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 04:02:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 04:02:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 04:02:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 04:02:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 04:02:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 04:02:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 04:02:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 04:02:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 04:02:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 04:02:00,327 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 04:02:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 04:02:00,327 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 04:02:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:02:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 04:02:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 04:02:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 04:02:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 04:02:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:02:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:02:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 04:02:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 04:02:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 04:02:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 04:02:00,494 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:02:00,497 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:02:01,996 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:02:02,938 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:02:02,939 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:02:02,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:02 BoogieIcfgContainer [2022-11-03 04:02:02,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:02:02,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:02:02,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:02:02,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:02:02,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:58" (1/3) ... [2022-11-03 04:02:02,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263182fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:02, skipping insertion in model container [2022-11-03 04:02:02,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:59" (2/3) ... [2022-11-03 04:02:02,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263182fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:02, skipping insertion in model container [2022-11-03 04:02:02,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:02" (3/3) ... [2022-11-03 04:02:02,959 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2022-11-03 04:02:02,982 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:02:02,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:02:03,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:02:03,089 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;@43e939ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:02:03,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:02:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 04:02:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 04:02:03,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:03,166 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] [2022-11-03 04:02:03,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059780, now seen corresponding path program 1 times [2022-11-03 04:02:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901988149] [2022-11-03 04:02:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:03,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:03,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901988149] [2022-11-03 04:02:03,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901988149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:03,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:03,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:02:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10794092] [2022-11-03 04:02:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:03,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 04:02:03,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 04:02:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:02:03,805 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 04:02:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:03,969 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2022-11-03 04:02:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 04:02:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-03 04:02:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:03,988 INFO L225 Difference]: With dead ends: 424 [2022-11-03 04:02:03,989 INFO L226 Difference]: Without dead ends: 402 [2022-11-03 04:02:03,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:02:03,996 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:03,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-03 04:02:04,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-03 04:02:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 04:02:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2022-11-03 04:02:04,147 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2022-11-03 04:02:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:04,149 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2022-11-03 04:02:04,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 04:02:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2022-11-03 04:02:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 04:02:04,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:04,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:04,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:02:04,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1857954273, now seen corresponding path program 1 times [2022-11-03 04:02:04,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:04,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995776884] [2022-11-03 04:02:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:04,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:04,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:04,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995776884] [2022-11-03 04:02:04,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995776884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:04,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:04,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:02:04,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924846399] [2022-11-03 04:02:04,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:04,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:02:04,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:02:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:04,771 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 04:02:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:07,402 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2022-11-03 04:02:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-03 04:02:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:07,419 INFO L225 Difference]: With dead ends: 1312 [2022-11-03 04:02:07,420 INFO L226 Difference]: Without dead ends: 926 [2022-11-03 04:02:07,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:07,434 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 1277 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:07,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1218 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 04:02:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-03 04:02:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2022-11-03 04:02:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2022-11-03 04:02:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2022-11-03 04:02:07,586 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2022-11-03 04:02:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:07,588 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2022-11-03 04:02:07,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 04:02:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2022-11-03 04:02:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 04:02:07,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:07,604 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:07,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:02:07,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash -5833543, now seen corresponding path program 1 times [2022-11-03 04:02:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:07,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623369566] [2022-11-03 04:02:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:08,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:08,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623369566] [2022-11-03 04:02:08,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623369566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:08,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:08,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183209566] [2022-11-03 04:02:08,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:08,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:08,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:08,313 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 04:02:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:11,098 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2022-11-03 04:02:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:02:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-03 04:02:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:11,120 INFO L225 Difference]: With dead ends: 2617 [2022-11-03 04:02:11,120 INFO L226 Difference]: Without dead ends: 1795 [2022-11-03 04:02:11,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:02:11,128 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 1198 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:11,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 1919 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:02:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-11-03 04:02:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2022-11-03 04:02:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1203 states have (on average 1.5901911886949294) internal successors, (1913), 1259 states have internal predecessors, (1913), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2022-11-03 04:02:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2022-11-03 04:02:11,261 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2022-11-03 04:02:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:11,262 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2022-11-03 04:02:11,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 04:02:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2022-11-03 04:02:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 04:02:11,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:11,267 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:11,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:02:11,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1071408980, now seen corresponding path program 1 times [2022-11-03 04:02:11,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:11,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354822370] [2022-11-03 04:02:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:11,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:11,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:11,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354822370] [2022-11-03 04:02:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354822370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:11,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:11,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:02:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573734344] [2022-11-03 04:02:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:11,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:02:11,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:02:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:11,630 INFO L87 Difference]: Start difference. First operand 1708 states and 2752 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:12,474 INFO L93 Difference]: Finished difference Result 1807 states and 2914 transitions. [2022-11-03 04:02:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-03 04:02:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:12,515 INFO L225 Difference]: With dead ends: 1807 [2022-11-03 04:02:12,515 INFO L226 Difference]: Without dead ends: 1792 [2022-11-03 04:02:12,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:12,524 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 720 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:12,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1940 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:02:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-11-03 04:02:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1714. [2022-11-03 04:02:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1209 states have (on average 1.587262200165426) internal successors, (1919), 1265 states have internal predecessors, (1919), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2022-11-03 04:02:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2758 transitions. [2022-11-03 04:02:12,741 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2758 transitions. Word has length 92 [2022-11-03 04:02:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:12,742 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2758 transitions. [2022-11-03 04:02:12,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2758 transitions. [2022-11-03 04:02:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 04:02:12,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:12,747 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:12,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:02:12,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1984549610, now seen corresponding path program 1 times [2022-11-03 04:02:12,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:12,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380680183] [2022-11-03 04:02:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:12,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:13,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380680183] [2022-11-03 04:02:13,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380680183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:13,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:13,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 04:02:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477624669] [2022-11-03 04:02:13,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:13,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 04:02:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 04:02:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:02:13,417 INFO L87 Difference]: Start difference. First operand 1714 states and 2758 transitions. Second operand has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 04:02:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:20,837 INFO L93 Difference]: Finished difference Result 4973 states and 7968 transitions. [2022-11-03 04:02:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 04:02:20,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-11-03 04:02:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:20,860 INFO L225 Difference]: With dead ends: 4973 [2022-11-03 04:02:20,860 INFO L226 Difference]: Without dead ends: 3273 [2022-11-03 04:02:20,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 04:02:20,871 INFO L413 NwaCegarLoop]: 990 mSDtfsCounter, 2739 mSDsluCounter, 3593 mSDsCounter, 0 mSdLazyCounter, 8949 mSolverCounterSat, 1662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2768 SdHoareTripleChecker+Valid, 4396 SdHoareTripleChecker+Invalid, 10611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1662 IncrementalHoareTripleChecker+Valid, 8949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:20,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2768 Valid, 4396 Invalid, 10611 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1662 Valid, 8949 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 04:02:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-11-03 04:02:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2991. [2022-11-03 04:02:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2069 states have (on average 1.5616239729337844) internal successors, (3231), 2166 states have internal predecessors, (3231), 728 states have call successors, (728), 174 states have call predecessors, (728), 193 states have return successors, (779), 694 states have call predecessors, (779), 723 states have call successors, (779) [2022-11-03 04:02:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4738 transitions. [2022-11-03 04:02:21,215 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4738 transitions. Word has length 97 [2022-11-03 04:02:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:21,216 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4738 transitions. [2022-11-03 04:02:21,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 04:02:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4738 transitions. [2022-11-03 04:02:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:02:21,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:21,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:21,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:02:21,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1903755269, now seen corresponding path program 1 times [2022-11-03 04:02:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:21,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466800940] [2022-11-03 04:02:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:21,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:02:21,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:21,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466800940] [2022-11-03 04:02:21,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466800940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:21,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:21,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80605721] [2022-11-03 04:02:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:21,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:21,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:21,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:21,527 INFO L87 Difference]: Start difference. First operand 2991 states and 4738 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:23,348 INFO L93 Difference]: Finished difference Result 8037 states and 12889 transitions. [2022-11-03 04:02:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-11-03 04:02:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:23,393 INFO L225 Difference]: With dead ends: 8037 [2022-11-03 04:02:23,393 INFO L226 Difference]: Without dead ends: 5066 [2022-11-03 04:02:23,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:23,415 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 1208 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:23,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 989 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 04:02:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2022-11-03 04:02:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4691. [2022-11-03 04:02:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3252 states have (on average 1.556580565805658) internal successors, (5062), 3413 states have internal predecessors, (5062), 1131 states have call successors, (1131), 262 states have call predecessors, (1131), 307 states have return successors, (1262), 1075 states have call predecessors, (1262), 1126 states have call successors, (1262) [2022-11-03 04:02:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7455 transitions. [2022-11-03 04:02:23,965 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7455 transitions. Word has length 104 [2022-11-03 04:02:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:23,966 INFO L495 AbstractCegarLoop]: Abstraction has 4691 states and 7455 transitions. [2022-11-03 04:02:23,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7455 transitions. [2022-11-03 04:02:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 04:02:23,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:23,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:23,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:02:23,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1112836714, now seen corresponding path program 1 times [2022-11-03 04:02:23,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:23,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377250785] [2022-11-03 04:02:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:02:24,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:24,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377250785] [2022-11-03 04:02:24,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377250785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:24,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:24,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765360043] [2022-11-03 04:02:24,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:24,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:24,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:24,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:24,310 INFO L87 Difference]: Start difference. First operand 4691 states and 7455 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:26,758 INFO L93 Difference]: Finished difference Result 13030 states and 21062 transitions. [2022-11-03 04:02:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-11-03 04:02:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:26,825 INFO L225 Difference]: With dead ends: 13030 [2022-11-03 04:02:26,825 INFO L226 Difference]: Without dead ends: 8362 [2022-11-03 04:02:26,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:26,863 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 1195 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:26,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 998 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 04:02:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8362 states. [2022-11-03 04:02:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8362 to 7900. [2022-11-03 04:02:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 5490 states have (on average 1.5546448087431695) internal successors, (8535), 5792 states have internal predecessors, (8535), 1875 states have call successors, (1875), 438 states have call predecessors, (1875), 534 states have return successors, (2226), 1769 states have call predecessors, (2226), 1870 states have call successors, (2226) [2022-11-03 04:02:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 12636 transitions. [2022-11-03 04:02:27,893 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 12636 transitions. Word has length 105 [2022-11-03 04:02:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:27,898 INFO L495 AbstractCegarLoop]: Abstraction has 7900 states and 12636 transitions. [2022-11-03 04:02:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 12636 transitions. [2022-11-03 04:02:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 04:02:27,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:27,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:27,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:02:27,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash 137911581, now seen corresponding path program 1 times [2022-11-03 04:02:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:27,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391523721] [2022-11-03 04:02:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:02:28,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:28,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391523721] [2022-11-03 04:02:28,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391523721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:28,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:28,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:28,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985000241] [2022-11-03 04:02:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:28,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:28,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:28,301 INFO L87 Difference]: Start difference. First operand 7900 states and 12636 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:31,448 INFO L93 Difference]: Finished difference Result 22793 states and 37460 transitions. [2022-11-03 04:02:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-11-03 04:02:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:31,570 INFO L225 Difference]: With dead ends: 22793 [2022-11-03 04:02:31,570 INFO L226 Difference]: Without dead ends: 14922 [2022-11-03 04:02:31,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:31,618 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 1182 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:31,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 1007 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 04:02:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14922 states. [2022-11-03 04:02:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14922 to 14257. [2022-11-03 04:02:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14257 states, 9913 states have (on average 1.5507918894381116) internal successors, (15373), 10511 states have internal predecessors, (15373), 3341 states have call successors, (3341), 790 states have call predecessors, (3341), 1002 states have return successors, (4384), 3135 states have call predecessors, (4384), 3336 states have call successors, (4384) [2022-11-03 04:02:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14257 states to 14257 states and 23098 transitions. [2022-11-03 04:02:33,433 INFO L78 Accepts]: Start accepts. Automaton has 14257 states and 23098 transitions. Word has length 106 [2022-11-03 04:02:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:33,434 INFO L495 AbstractCegarLoop]: Abstraction has 14257 states and 23098 transitions. [2022-11-03 04:02:33,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 14257 states and 23098 transitions. [2022-11-03 04:02:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 04:02:33,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:33,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:33,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:02:33,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash -19992564, now seen corresponding path program 1 times [2022-11-03 04:02:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942568514] [2022-11-03 04:02:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:02:33,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942568514] [2022-11-03 04:02:33,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942568514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:33,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:33,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:33,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193311692] [2022-11-03 04:02:33,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:33,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:33,873 INFO L87 Difference]: Start difference. First operand 14257 states and 23098 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:37,628 INFO L93 Difference]: Finished difference Result 42146 states and 71423 transitions. [2022-11-03 04:02:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:37,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-11-03 04:02:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:37,847 INFO L225 Difference]: With dead ends: 42146 [2022-11-03 04:02:37,847 INFO L226 Difference]: Without dead ends: 27930 [2022-11-03 04:02:37,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:37,919 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1169 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:37,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 1019 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 04:02:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27930 states. [2022-11-03 04:02:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27930 to 26830. [2022-11-03 04:02:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26830 states, 18640 states have (on average 1.5454399141630901) internal successors, (28807), 19858 states have internal predecessors, (28807), 6223 states have call successors, (6223), 1494 states have call predecessors, (6223), 1966 states have return successors, (9502), 5817 states have call predecessors, (9502), 6218 states have call successors, (9502) [2022-11-03 04:02:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26830 states to 26830 states and 44532 transitions. [2022-11-03 04:02:41,173 INFO L78 Accepts]: Start accepts. Automaton has 26830 states and 44532 transitions. Word has length 107 [2022-11-03 04:02:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:41,174 INFO L495 AbstractCegarLoop]: Abstraction has 26830 states and 44532 transitions. [2022-11-03 04:02:41,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:41,174 INFO L276 IsEmpty]: Start isEmpty. Operand 26830 states and 44532 transitions. [2022-11-03 04:02:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 04:02:41,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:41,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:41,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:02:41,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash -620049857, now seen corresponding path program 1 times [2022-11-03 04:02:41,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:41,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091278505] [2022-11-03 04:02:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:02:41,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091278505] [2022-11-03 04:02:41,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091278505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:41,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:41,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:41,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931766795] [2022-11-03 04:02:41,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:41,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:41,493 INFO L87 Difference]: Start difference. First operand 26830 states and 44532 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:47,634 INFO L93 Difference]: Finished difference Result 80628 states and 144213 transitions. [2022-11-03 04:02:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:47,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-11-03 04:02:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:48,050 INFO L225 Difference]: With dead ends: 80628 [2022-11-03 04:02:48,051 INFO L226 Difference]: Without dead ends: 53853 [2022-11-03 04:02:48,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:48,210 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 1178 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:48,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1013 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 04:02:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53853 states. [2022-11-03 04:02:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53853 to 51494. [2022-11-03 04:02:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51494 states, 35791 states have (on average 1.542790086893353) internal successors, (55218), 38195 states have internal predecessors, (55218), 11873 states have call successors, (11873), 2892 states have call predecessors, (11873), 3829 states have return successors, (21476), 11066 states have call predecessors, (21476), 11868 states have call successors, (21476) [2022-11-03 04:02:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51494 states to 51494 states and 88567 transitions. [2022-11-03 04:02:54,321 INFO L78 Accepts]: Start accepts. Automaton has 51494 states and 88567 transitions. Word has length 108 [2022-11-03 04:02:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:54,322 INFO L495 AbstractCegarLoop]: Abstraction has 51494 states and 88567 transitions. [2022-11-03 04:02:54,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 04:02:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 51494 states and 88567 transitions. [2022-11-03 04:02:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 04:02:54,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:54,338 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:54,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:02:54,338 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:54,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1540139114, now seen corresponding path program 1 times [2022-11-03 04:02:54,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:54,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085772919] [2022-11-03 04:02:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 04:02:54,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:54,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085772919] [2022-11-03 04:02:54,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085772919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:54,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:54,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:54,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364747734] [2022-11-03 04:02:54,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:54,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:54,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:54,590 INFO L87 Difference]: Start difference. First operand 51494 states and 88567 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 04:03:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:00,429 INFO L93 Difference]: Finished difference Result 104654 states and 186136 transitions. [2022-11-03 04:03:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:03:00,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-11-03 04:03:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:00,919 INFO L225 Difference]: With dead ends: 104654 [2022-11-03 04:03:00,919 INFO L226 Difference]: Without dead ends: 53177 [2022-11-03 04:03:01,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:03:01,307 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 30 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:01,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1759 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53177 states. [2022-11-03 04:03:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53177 to 51692. [2022-11-03 04:03:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51692 states, 35989 states have (on average 1.539803828947734) internal successors, (55416), 38393 states have internal predecessors, (55416), 11873 states have call successors, (11873), 2892 states have call predecessors, (11873), 3829 states have return successors, (21476), 11066 states have call predecessors, (21476), 11868 states have call successors, (21476) [2022-11-03 04:03:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51692 states to 51692 states and 88765 transitions. [2022-11-03 04:03:06,736 INFO L78 Accepts]: Start accepts. Automaton has 51692 states and 88765 transitions. Word has length 156 [2022-11-03 04:03:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:06,737 INFO L495 AbstractCegarLoop]: Abstraction has 51692 states and 88765 transitions. [2022-11-03 04:03:06,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 04:03:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 51692 states and 88765 transitions.