./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:09:54,245 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:09:54,321 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:09:54,327 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:09:54,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:09:54,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:09:54,368 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:09:54,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:09:54,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:09:54,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:09:54,370 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:09:54,371 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:09:54,372 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:09:54,372 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:09:54,373 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:09:54,373 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:09:54,374 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:09:54,374 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:09:54,375 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:09:54,375 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:09:54,376 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:09:54,380 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:09:54,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:09:54,382 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:09:54,382 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:09:54,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:09:54,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:09:54,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:09:54,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:09:54,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:09:54,385 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:09:54,386 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:09:54,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:09:54,387 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:09:54,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:09:54,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:09:54,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:09:54,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:09:54,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:09:54,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:09:54,395 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:09:54,396 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:09:54,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:09:54,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:09:54,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:09:54,397 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:09:54,397 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:09:54,397 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2023-11-25 00:09:54,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:09:54,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:09:54,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:09:54,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:09:54,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:09:54,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2023-11-25 00:09:57,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:09:58,220 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:09:58,221 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2023-11-25 00:09:58,256 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/data/b61a726a3/500d23a09c7b4523b6512077f138874e/FLAG0b473faf3 [2023-11-25 00:09:58,271 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/data/b61a726a3/500d23a09c7b4523b6512077f138874e [2023-11-25 00:09:58,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:09:58,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:09:58,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:09:58,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:09:58,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:09:58,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:09:58" (1/1) ... [2023-11-25 00:09:58,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4c41a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:58, skipping insertion in model container [2023-11-25 00:09:58,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:09:58" (1/1) ... [2023-11-25 00:09:58,386 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:09:58,696 WARN L240 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_5cd7e780-981f-4f3b-9c45-63ba158273ca/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2023-11-25 00:09:59,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:09:59,026 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:09:59,036 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2023-11-25 00:09:59,038 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [147] [2023-11-25 00:09:59,038 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [165] [2023-11-25 00:09:59,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [832] [2023-11-25 00:09:59,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [952] [2023-11-25 00:09:59,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [961] [2023-11-25 00:09:59,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2404] [2023-11-25 00:09:59,040 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2442] [2023-11-25 00:09:59,040 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2790] [2023-11-25 00:09:59,040 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2976] [2023-11-25 00:09:59,079 WARN L240 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_5cd7e780-981f-4f3b-9c45-63ba158273ca/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2023-11-25 00:09:59,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:09:59,231 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:09:59,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59 WrapperNode [2023-11-25 00:09:59,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:09:59,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:09:59,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:09:59,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:09:59,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,396 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 807 [2023-11-25 00:09:59,397 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:09:59,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:09:59,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:09:59,398 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:09:59,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,437 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,462 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:09:59,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:09:59,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:09:59,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:09:59,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (1/1) ... [2023-11-25 00:09:59,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:09:59,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:59,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:09:59,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:09:59,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:09:59,579 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-25 00:09:59,579 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-25 00:09:59,579 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-25 00:09:59,580 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-25 00:09:59,581 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-25 00:09:59,581 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-25 00:09:59,582 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-25 00:09:59,582 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-25 00:09:59,582 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-25 00:09:59,582 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-25 00:09:59,584 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-25 00:09:59,605 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-25 00:09:59,605 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-25 00:09:59,605 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-25 00:09:59,605 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-25 00:09:59,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-25 00:09:59,606 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-25 00:09:59,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-25 00:09:59,606 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-25 00:09:59,606 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-25 00:09:59,606 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-25 00:09:59,607 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-25 00:09:59,607 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-25 00:09:59,607 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-25 00:09:59,607 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-25 00:09:59,607 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-25 00:09:59,608 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-25 00:09:59,608 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-25 00:09:59,608 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-25 00:09:59,608 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-25 00:09:59,608 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-25 00:09:59,608 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-25 00:09:59,609 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-25 00:09:59,609 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-25 00:09:59,609 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-25 00:09:59,609 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-25 00:09:59,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:09:59,609 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-25 00:09:59,610 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-25 00:09:59,610 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-25 00:09:59,610 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-25 00:09:59,610 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-25 00:09:59,610 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-25 00:09:59,610 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-25 00:09:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-25 00:09:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:09:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:09:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-25 00:09:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-25 00:09:59,754 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:09:59,756 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:10:00,854 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:10:01,814 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:10:01,814 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:10:01,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:10:01 BoogieIcfgContainer [2023-11-25 00:10:01,816 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:10:01,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:10:01,820 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:10:01,824 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:10:01,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:09:58" (1/3) ... [2023-11-25 00:10:01,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698215b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:10:01, skipping insertion in model container [2023-11-25 00:10:01,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:09:59" (2/3) ... [2023-11-25 00:10:01,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698215b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:10:01, skipping insertion in model container [2023-11-25 00:10:01,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:10:01" (3/3) ... [2023-11-25 00:10:01,829 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2023-11-25 00:10:01,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:10:01,851 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:10:01,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:10:01,942 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=LoopHeads, 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;@344010a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:10:01,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:10:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-25 00:10:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-25 00:10:01,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:01,984 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:01,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:01,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1665794326, now seen corresponding path program 1 times [2023-11-25 00:10:02,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:02,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178950718] [2023-11-25 00:10:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:02,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:02,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178950718] [2023-11-25 00:10:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178950718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:02,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:02,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:02,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333777961] [2023-11-25 00:10:02,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:02,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:03,003 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-25 00:10:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:03,667 INFO L93 Difference]: Finished difference Result 1056 states and 1711 transitions. [2023-11-25 00:10:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2023-11-25 00:10:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:03,704 INFO L225 Difference]: With dead ends: 1056 [2023-11-25 00:10:03,704 INFO L226 Difference]: Without dead ends: 681 [2023-11-25 00:10:03,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:10:03,722 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 488 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:03,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1690 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:10:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-11-25 00:10:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 675. [2023-11-25 00:10:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 457 states have (on average 1.5229759299781183) internal successors, (696), 487 states have internal predecessors, (696), 178 states have call successors, (178), 43 states have call predecessors, (178), 39 states have return successors, (179), 169 states have call predecessors, (179), 174 states have call successors, (179) [2023-11-25 00:10:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1053 transitions. [2023-11-25 00:10:03,881 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1053 transitions. Word has length 63 [2023-11-25 00:10:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:03,882 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 1053 transitions. [2023-11-25 00:10:03,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-25 00:10:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1053 transitions. [2023-11-25 00:10:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-25 00:10:03,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:03,890 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:03,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:10:03,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:03,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1607558271, now seen corresponding path program 1 times [2023-11-25 00:10:03,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:03,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498830972] [2023-11-25 00:10:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:03,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:04,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:04,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498830972] [2023-11-25 00:10:04,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498830972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:04,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:04,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:10:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758436459] [2023-11-25 00:10:04,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:04,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:04,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:04,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:10:04,230 INFO L87 Difference]: Start difference. First operand 675 states and 1053 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-25 00:10:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:04,629 INFO L93 Difference]: Finished difference Result 1298 states and 2075 transitions. [2023-11-25 00:10:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2023-11-25 00:10:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:04,643 INFO L225 Difference]: With dead ends: 1298 [2023-11-25 00:10:04,644 INFO L226 Difference]: Without dead ends: 865 [2023-11-25 00:10:04,652 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 [2023-11-25 00:10:04,655 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 139 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:04,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1704 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:10:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-25 00:10:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 771. [2023-11-25 00:10:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 507 states have (on average 1.514792899408284) internal successors, (768), 550 states have internal predecessors, (768), 223 states have call successors, (223), 43 states have call predecessors, (223), 40 states have return successors, (228), 214 states have call predecessors, (228), 219 states have call successors, (228) [2023-11-25 00:10:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1219 transitions. [2023-11-25 00:10:04,749 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1219 transitions. Word has length 68 [2023-11-25 00:10:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:04,750 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1219 transitions. [2023-11-25 00:10:04,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-25 00:10:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1219 transitions. [2023-11-25 00:10:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-25 00:10:04,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:04,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:04,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:10:04,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:04,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1594280789, now seen corresponding path program 1 times [2023-11-25 00:10:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:04,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723323964] [2023-11-25 00:10:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:10:05,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:05,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723323964] [2023-11-25 00:10:05,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723323964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459073988] [2023-11-25 00:10:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:05,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:05,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:05,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:05,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:10:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:05,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:10:05,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:06,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:06,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459073988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:06,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-25 00:10:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845185414] [2023-11-25 00:10:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:10:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:10:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:06,118 INFO L87 Difference]: Start difference. First operand 771 states and 1219 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-25 00:10:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:06,865 INFO L93 Difference]: Finished difference Result 1305 states and 2073 transitions. [2023-11-25 00:10:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:10:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2023-11-25 00:10:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:06,875 INFO L225 Difference]: With dead ends: 1305 [2023-11-25 00:10:06,876 INFO L226 Difference]: Without dead ends: 779 [2023-11-25 00:10:06,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:10:06,883 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 483 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:06,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1636 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:10:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-11-25 00:10:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 775. [2023-11-25 00:10:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 509 states have (on average 1.512770137524558) internal successors, (770), 553 states have internal predecessors, (770), 223 states have call successors, (223), 44 states have call predecessors, (223), 42 states have return successors, (229), 214 states have call predecessors, (229), 219 states have call successors, (229) [2023-11-25 00:10:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1222 transitions. [2023-11-25 00:10:06,958 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1222 transitions. Word has length 72 [2023-11-25 00:10:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:06,959 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1222 transitions. [2023-11-25 00:10:06,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-25 00:10:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1222 transitions. [2023-11-25 00:10:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-25 00:10:06,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:06,962 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:06,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:07,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:07,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:07,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash 62701401, now seen corresponding path program 1 times [2023-11-25 00:10:07,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:07,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40146911] [2023-11-25 00:10:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:07,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:10:07,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40146911] [2023-11-25 00:10:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40146911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924732796] [2023-11-25 00:10:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:07,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:07,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:10:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:07,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:10:07,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:08,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:08,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924732796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:08,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:08,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-25 00:10:08,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984687286] [2023-11-25 00:10:08,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:08,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:08,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:10:08,052 INFO L87 Difference]: Start difference. First operand 775 states and 1222 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-25 00:10:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:08,372 INFO L93 Difference]: Finished difference Result 1404 states and 2250 transitions. [2023-11-25 00:10:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:10:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2023-11-25 00:10:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:08,380 INFO L225 Difference]: With dead ends: 1404 [2023-11-25 00:10:08,381 INFO L226 Difference]: Without dead ends: 775 [2023-11-25 00:10:08,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:08,390 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 266 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:08,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1543 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:10:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2023-11-25 00:10:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2023-11-25 00:10:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 509 states have (on average 1.4852652259332024) internal successors, (756), 553 states have internal predecessors, (756), 223 states have call successors, (223), 44 states have call predecessors, (223), 42 states have return successors, (229), 214 states have call predecessors, (229), 219 states have call successors, (229) [2023-11-25 00:10:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1208 transitions. [2023-11-25 00:10:08,454 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1208 transitions. Word has length 73 [2023-11-25 00:10:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:08,455 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1208 transitions. [2023-11-25 00:10:08,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-25 00:10:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1208 transitions. [2023-11-25 00:10:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-25 00:10:08,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:08,463 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:08,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:10:08,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:08,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:08,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1253365990, now seen corresponding path program 1 times [2023-11-25 00:10:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:08,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737103120] [2023-11-25 00:10:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:08,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:09,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737103120] [2023-11-25 00:10:09,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737103120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790387181] [2023-11-25 00:10:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:09,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:09,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:09,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:09,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:10:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:09,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-25 00:10:09,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:10:09,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:10:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790387181] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:10,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:10:10,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2023-11-25 00:10:10,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984769844] [2023-11-25 00:10:10,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:10:10,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:10:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:10:10,024 INFO L87 Difference]: Start difference. First operand 775 states and 1208 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-25 00:10:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:13,454 INFO L93 Difference]: Finished difference Result 1882 states and 3026 transitions. [2023-11-25 00:10:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-25 00:10:13,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2023-11-25 00:10:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:13,472 INFO L225 Difference]: With dead ends: 1882 [2023-11-25 00:10:13,472 INFO L226 Difference]: Without dead ends: 1430 [2023-11-25 00:10:13,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2023-11-25 00:10:13,481 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 2802 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2881 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:13,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2881 Valid, 2533 Invalid, 3032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1258 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-25 00:10:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2023-11-25 00:10:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1183. [2023-11-25 00:10:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 822 states have (on average 1.5036496350364963) internal successors, (1236), 869 states have internal predecessors, (1236), 288 states have call successors, (288), 73 states have call predecessors, (288), 72 states have return successors, (325), 276 states have call predecessors, (325), 283 states have call successors, (325) [2023-11-25 00:10:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1849 transitions. [2023-11-25 00:10:13,630 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1849 transitions. Word has length 75 [2023-11-25 00:10:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:13,631 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1849 transitions. [2023-11-25 00:10:13,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-25 00:10:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1849 transitions. [2023-11-25 00:10:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-25 00:10:13,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:13,636 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:13,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:13,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:13,844 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:13,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash 503907876, now seen corresponding path program 1 times [2023-11-25 00:10:13,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:13,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167633752] [2023-11-25 00:10:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:14,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167633752] [2023-11-25 00:10:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167633752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:14,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420017385] [2023-11-25 00:10:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:14,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:14,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:14,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:10:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:14,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:10:14,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:14,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:14,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420017385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:14,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:14,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-25 00:10:14,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483228525] [2023-11-25 00:10:14,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:14,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:10:14,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:10:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:14,710 INFO L87 Difference]: Start difference. First operand 1183 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-25 00:10:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:15,048 INFO L93 Difference]: Finished difference Result 3386 states and 5439 transitions. [2023-11-25 00:10:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:10:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2023-11-25 00:10:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:15,069 INFO L225 Difference]: With dead ends: 3386 [2023-11-25 00:10:15,069 INFO L226 Difference]: Without dead ends: 2215 [2023-11-25 00:10:15,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:15,080 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 458 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:15,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 1308 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-11-25 00:10:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2159. [2023-11-25 00:10:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 1510 states have (on average 1.5119205298013245) internal successors, (2283), 1605 states have internal predecessors, (2283), 512 states have call successors, (512), 131 states have call predecessors, (512), 136 states have return successors, (604), 494 states have call predecessors, (604), 507 states have call successors, (604) [2023-11-25 00:10:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3399 transitions. [2023-11-25 00:10:15,268 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3399 transitions. Word has length 76 [2023-11-25 00:10:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:15,268 INFO L495 AbstractCegarLoop]: Abstraction has 2159 states and 3399 transitions. [2023-11-25 00:10:15,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-25 00:10:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3399 transitions. [2023-11-25 00:10:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-25 00:10:15,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:15,272 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:15,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:15,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:15,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:15,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1073560945, now seen corresponding path program 1 times [2023-11-25 00:10:15,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:15,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336061620] [2023-11-25 00:10:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:15,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:10:15,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336061620] [2023-11-25 00:10:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336061620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976527632] [2023-11-25 00:10:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:15,923 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:15,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:10:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:16,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:10:16,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:10:16,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:16,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976527632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:16,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:16,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-25 00:10:16,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970150269] [2023-11-25 00:10:16,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:16,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:10:16,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:16,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:10:16,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:16,356 INFO L87 Difference]: Start difference. First operand 2159 states and 3399 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-25 00:10:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:16,715 INFO L93 Difference]: Finished difference Result 5054 states and 8065 transitions. [2023-11-25 00:10:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:10:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-11-25 00:10:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:16,752 INFO L225 Difference]: With dead ends: 5054 [2023-11-25 00:10:16,752 INFO L226 Difference]: Without dead ends: 2907 [2023-11-25 00:10:16,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:16,776 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 520 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:16,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1004 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2023-11-25 00:10:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2863. [2023-11-25 00:10:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (795), 646 states have call predecessors, (795), 662 states have call successors, (795) [2023-11-25 00:10:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4526 transitions. [2023-11-25 00:10:17,080 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4526 transitions. Word has length 75 [2023-11-25 00:10:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:17,081 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 4526 transitions. [2023-11-25 00:10:17,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-25 00:10:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4526 transitions. [2023-11-25 00:10:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-25 00:10:17,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:17,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:10:17,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:17,293 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:17,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1103674593, now seen corresponding path program 1 times [2023-11-25 00:10:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266933974] [2023-11-25 00:10:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:17,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266933974] [2023-11-25 00:10:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266933974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864419966] [2023-11-25 00:10:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:17,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:17,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:17,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:10:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:18,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:10:18,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:10:18,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:18,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864419966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:18,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:18,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-25 00:10:18,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781432408] [2023-11-25 00:10:18,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:18,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:10:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:10:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:18,216 INFO L87 Difference]: Start difference. First operand 2863 states and 4526 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-25 00:10:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:19,002 INFO L93 Difference]: Finished difference Result 5145 states and 8164 transitions. [2023-11-25 00:10:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:10:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2023-11-25 00:10:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:19,029 INFO L225 Difference]: With dead ends: 5145 [2023-11-25 00:10:19,030 INFO L226 Difference]: Without dead ends: 2871 [2023-11-25 00:10:19,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:10:19,048 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 396 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:19,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2323 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:10:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2023-11-25 00:10:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2863. [2023-11-25 00:10:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (791), 646 states have call predecessors, (791), 662 states have call successors, (791) [2023-11-25 00:10:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4522 transitions. [2023-11-25 00:10:19,342 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4522 transitions. Word has length 79 [2023-11-25 00:10:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:19,344 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 4522 transitions. [2023-11-25 00:10:19,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-25 00:10:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4522 transitions. [2023-11-25 00:10:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-25 00:10:19,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:19,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:19,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:19,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:19,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:19,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:19,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1904341993, now seen corresponding path program 1 times [2023-11-25 00:10:19,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:19,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945075105] [2023-11-25 00:10:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-25 00:10:19,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:19,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945075105] [2023-11-25 00:10:19,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945075105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:19,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696884685] [2023-11-25 00:10:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:19,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:19,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:19,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:19,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:10:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:20,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:10:20,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-25 00:10:20,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:20,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696884685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:20,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:20,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-25 00:10:20,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821152400] [2023-11-25 00:10:20,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:20,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:10:20,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:20,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:10:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:20,374 INFO L87 Difference]: Start difference. First operand 2863 states and 4522 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-25 00:10:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:20,836 INFO L93 Difference]: Finished difference Result 5394 states and 8643 transitions. [2023-11-25 00:10:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:10:20,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2023-11-25 00:10:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:20,868 INFO L225 Difference]: With dead ends: 5394 [2023-11-25 00:10:20,868 INFO L226 Difference]: Without dead ends: 2971 [2023-11-25 00:10:20,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:20,890 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:20,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2208 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:10:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2023-11-25 00:10:21,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2928. [2023-11-25 00:10:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2057 states have (on average 1.5119105493437044) internal successors, (3110), 2195 states have internal predecessors, (3110), 674 states have call successors, (674), 170 states have call predecessors, (674), 196 states have return successors, (860), 658 states have call predecessors, (860), 669 states have call successors, (860) [2023-11-25 00:10:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4644 transitions. [2023-11-25 00:10:21,186 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4644 transitions. Word has length 99 [2023-11-25 00:10:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:21,186 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 4644 transitions. [2023-11-25 00:10:21,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-25 00:10:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4644 transitions. [2023-11-25 00:10:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-25 00:10:21,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:21,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:21,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:21,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:21,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:21,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1952649793, now seen corresponding path program 1 times [2023-11-25 00:10:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:21,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210407222] [2023-11-25 00:10:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:21,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-25 00:10:21,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210407222] [2023-11-25 00:10:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210407222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467868851] [2023-11-25 00:10:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:21,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:21,893 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:21,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:10:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:22,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 1848 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:10:22,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:10:22,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467868851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:22,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:22,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-25 00:10:22,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522205412] [2023-11-25 00:10:22,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:22,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:10:22,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:22,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:10:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:22,389 INFO L87 Difference]: Start difference. First operand 2928 states and 4644 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-25 00:10:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:22,764 INFO L93 Difference]: Finished difference Result 6622 states and 10729 transitions. [2023-11-25 00:10:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:10:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2023-11-25 00:10:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:22,803 INFO L225 Difference]: With dead ends: 6622 [2023-11-25 00:10:22,803 INFO L226 Difference]: Without dead ends: 3706 [2023-11-25 00:10:22,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:22,823 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 526 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:22,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1232 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2023-11-25 00:10:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3643. [2023-11-25 00:10:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2570 states have (on average 1.5140077821011673) internal successors, (3891), 2742 states have internal predecessors, (3891), 830 states have call successors, (830), 207 states have call predecessors, (830), 242 states have return successors, (1064), 813 states have call predecessors, (1064), 825 states have call successors, (1064) [2023-11-25 00:10:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5785 transitions. [2023-11-25 00:10:23,197 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5785 transitions. Word has length 117 [2023-11-25 00:10:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:23,197 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5785 transitions. [2023-11-25 00:10:23,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-25 00:10:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5785 transitions. [2023-11-25 00:10:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-25 00:10:23,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:23,210 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:23,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:23,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-25 00:10:23,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:23,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -390045206, now seen corresponding path program 1 times [2023-11-25 00:10:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:23,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879840259] [2023-11-25 00:10:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:23,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-25 00:10:23,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:23,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879840259] [2023-11-25 00:10:23,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879840259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:23,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694242716] [2023-11-25 00:10:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:23,903 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:23,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:10:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:24,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:10:24,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:10:24,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:24,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694242716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:24,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-25 00:10:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724206041] [2023-11-25 00:10:24,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:24,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:10:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:10:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:24,439 INFO L87 Difference]: Start difference. First operand 3643 states and 5785 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-25 00:10:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:24,861 INFO L93 Difference]: Finished difference Result 7330 states and 11833 transitions. [2023-11-25 00:10:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:10:24,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2023-11-25 00:10:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:24,901 INFO L225 Difference]: With dead ends: 7330 [2023-11-25 00:10:24,901 INFO L226 Difference]: Without dead ends: 3699 [2023-11-25 00:10:24,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:10:24,923 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 457 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:24,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1479 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2023-11-25 00:10:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3643. [2023-11-25 00:10:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2570 states have (on average 1.5116731517509727) internal successors, (3885), 2742 states have internal predecessors, (3885), 830 states have call successors, (830), 207 states have call predecessors, (830), 242 states have return successors, (1064), 813 states have call predecessors, (1064), 825 states have call successors, (1064) [2023-11-25 00:10:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5779 transitions. [2023-11-25 00:10:25,335 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5779 transitions. Word has length 118 [2023-11-25 00:10:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:25,336 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5779 transitions. [2023-11-25 00:10:25,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-25 00:10:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5779 transitions. [2023-11-25 00:10:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-25 00:10:25,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:25,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:25,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:25,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-25 00:10:25,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:25,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1563306231, now seen corresponding path program 1 times [2023-11-25 00:10:25,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044776624] [2023-11-25 00:10:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:25,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-25 00:10:25,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:25,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044776624] [2023-11-25 00:10:25,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044776624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:25,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377976426] [2023-11-25 00:10:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:25,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:25,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:25,954 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:25,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-25 00:10:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:26,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:10:26,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:10:26,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:26,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377976426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:26,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:26,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-25 00:10:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001114339] [2023-11-25 00:10:26,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:26,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:10:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:10:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:10:26,533 INFO L87 Difference]: Start difference. First operand 3643 states and 5779 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-25 00:10:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:30,109 INFO L93 Difference]: Finished difference Result 8184 states and 13170 transitions. [2023-11-25 00:10:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-25 00:10:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2023-11-25 00:10:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:30,149 INFO L225 Difference]: With dead ends: 8184 [2023-11-25 00:10:30,150 INFO L226 Difference]: Without dead ends: 4437 [2023-11-25 00:10:30,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-25 00:10:30,166 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1331 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:30,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 1633 Invalid, 3759 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [728 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-25 00:10:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2023-11-25 00:10:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 3702. [2023-11-25 00:10:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 2605 states have (on average 1.509021113243762) internal successors, (3931), 2781 states have internal predecessors, (3931), 853 states have call successors, (853), 207 states have call predecessors, (853), 243 states have return successors, (1118), 833 states have call predecessors, (1118), 848 states have call successors, (1118) [2023-11-25 00:10:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 5902 transitions. [2023-11-25 00:10:30,596 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 5902 transitions. Word has length 117 [2023-11-25 00:10:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:30,596 INFO L495 AbstractCegarLoop]: Abstraction has 3702 states and 5902 transitions. [2023-11-25 00:10:30,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-25 00:10:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 5902 transitions. [2023-11-25 00:10:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-25 00:10:30,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:30,606 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:30,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:30,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-25 00:10:30,815 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:30,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1207315174, now seen corresponding path program 1 times [2023-11-25 00:10:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:30,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156871368] [2023-11-25 00:10:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:30,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-25 00:10:31,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156871368] [2023-11-25 00:10:31,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156871368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:31,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223016093] [2023-11-25 00:10:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:31,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:31,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:31,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:31,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-25 00:10:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:31,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:10:31,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-25 00:10:31,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223016093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:31,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:31,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-25 00:10:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552424054] [2023-11-25 00:10:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:31,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:31,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:10:31,765 INFO L87 Difference]: Start difference. First operand 3702 states and 5902 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-25 00:10:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:32,992 INFO L93 Difference]: Finished difference Result 7680 states and 12516 transitions. [2023-11-25 00:10:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:10:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2023-11-25 00:10:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:33,053 INFO L225 Difference]: With dead ends: 7680 [2023-11-25 00:10:33,054 INFO L226 Difference]: Without dead ends: 4571 [2023-11-25 00:10:33,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:10:33,073 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 571 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:33,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1301 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:10:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2023-11-25 00:10:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4462. [2023-11-25 00:10:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 3045 states have (on average 1.4972085385878489) internal successors, (4559), 3269 states have internal predecessors, (4559), 1108 states have call successors, (1108), 279 states have call predecessors, (1108), 308 states have return successors, (1454), 1081 states have call predecessors, (1454), 1101 states have call successors, (1454) [2023-11-25 00:10:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 7121 transitions. [2023-11-25 00:10:33,630 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 7121 transitions. Word has length 123 [2023-11-25 00:10:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:33,634 INFO L495 AbstractCegarLoop]: Abstraction has 4462 states and 7121 transitions. [2023-11-25 00:10:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-25 00:10:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 7121 transitions. [2023-11-25 00:10:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:10:33,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:33,655 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:33,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:33,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:33,865 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:33,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:33,866 INFO L85 PathProgramCache]: Analyzing trace with hash -774204180, now seen corresponding path program 1 times [2023-11-25 00:10:33,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:33,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125152432] [2023-11-25 00:10:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:33,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-25 00:10:34,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:34,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125152432] [2023-11-25 00:10:34,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125152432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:34,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964716595] [2023-11-25 00:10:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:34,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:34,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:34,439 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:34,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-25 00:10:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:34,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-25 00:10:34,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-25 00:10:34,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:34,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964716595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:34,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:34,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-25 00:10:34,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445794490] [2023-11-25 00:10:34,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:10:34,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:10:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:10:34,960 INFO L87 Difference]: Start difference. First operand 4462 states and 7121 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-25 00:10:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:36,408 INFO L93 Difference]: Finished difference Result 11268 states and 18325 transitions. [2023-11-25 00:10:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:10:36,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2023-11-25 00:10:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:36,461 INFO L225 Difference]: With dead ends: 11268 [2023-11-25 00:10:36,462 INFO L226 Difference]: Without dead ends: 7377 [2023-11-25 00:10:36,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:10:36,488 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 520 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:36,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1961 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:10:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2023-11-25 00:10:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 7361. [2023-11-25 00:10:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 4944 states have (on average 1.4908980582524272) internal successors, (7371), 5339 states have internal predecessors, (7371), 1912 states have call successors, (1912), 473 states have call predecessors, (1912), 504 states have return successors, (2444), 1860 states have call predecessors, (2444), 1901 states have call successors, (2444) [2023-11-25 00:10:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11727 transitions. [2023-11-25 00:10:37,310 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11727 transitions. Word has length 124 [2023-11-25 00:10:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:37,311 INFO L495 AbstractCegarLoop]: Abstraction has 7361 states and 11727 transitions. [2023-11-25 00:10:37,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-25 00:10:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11727 transitions. [2023-11-25 00:10:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-25 00:10:37,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:37,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:37,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:37,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:37,533 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:10:37,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash -206538530, now seen corresponding path program 1 times [2023-11-25 00:10:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829541799] [2023-11-25 00:10:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-25 00:10:37,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829541799] [2023-11-25 00:10:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829541799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:37,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348517984] [2023-11-25 00:10:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:37,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:37,940 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:37,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cd7e780-981f-4f3b-9c45-63ba158273ca/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-25 00:10:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:38,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-25 00:10:38,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-25 00:10:38,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:10:38,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348517984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:38,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:10:38,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2023-11-25 00:10:38,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900266385] [2023-11-25 00:10:38,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:38,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:10:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:10:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:10:38,508 INFO L87 Difference]: Start difference. First operand 7361 states and 11727 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21)