./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product23.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_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/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_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/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_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/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 f91feaa60fbddcfc87f4cdb3911bff4dfabb88b0b67a46a205760e052b15032c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:53:17,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:53:17,575 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:53:17,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:53:17,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:53:17,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:53:17,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:53:17,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:53:17,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:53:17,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:53:17,612 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:53:17,613 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:53:17,613 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:53:17,614 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:53:17,614 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:53:17,615 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:53:17,615 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:53:17,616 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:53:17,616 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:53:17,617 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:53:17,617 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:53:17,618 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:53:17,619 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:53:17,619 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:53:17,619 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:53:17,620 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:53:17,620 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:53:17,621 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:53:17,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:53:17,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:53:17,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:53:17,622 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:53:17,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:53:17,623 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:53:17,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:53:17,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:53:17,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:53:17,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:53:17,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:53:17,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:53:17,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:53:17,625 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:53:17,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:53:17,625 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:53:17,625 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:53:17,625 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:53:17,626 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:53:17,626 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_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91feaa60fbddcfc87f4cdb3911bff4dfabb88b0b67a46a205760e052b15032c [2023-11-24 23:53:17,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:53:17,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:53:17,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:53:17,945 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:53:17,945 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:53:17,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c [2023-11-24 23:53:21,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:53:21,688 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:53:21,691 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c [2023-11-24 23:53:21,716 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/data/b76c9093c/8f2d3ca024f247609dbbbe15800ca343/FLAG6f9dd88f2 [2023-11-24 23:53:21,729 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/data/b76c9093c/8f2d3ca024f247609dbbbe15800ca343 [2023-11-24 23:53:21,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:53:21,733 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:53:21,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:53:21,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:53:21,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:53:21,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:53:21" (1/1) ... [2023-11-24 23:53:21,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c17006b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:21, skipping insertion in model container [2023-11-24 23:53:21,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:53:21" (1/1) ... [2023-11-24 23:53:21,847 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:53:22,052 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_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c[5798,5811] [2023-11-24 23:53:22,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:53:22,489 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:53:22,503 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-24 23:53:22,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [67] [2023-11-24 23:53:22,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [260] [2023-11-24 23:53:22,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [269] [2023-11-24 23:53:22,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1874] [2023-11-24 23:53:22,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1968] [2023-11-24 23:53:22,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2086] [2023-11-24 23:53:22,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2124] [2023-11-24 23:53:22,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2472] [2023-11-24 23:53:22,507 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2838] [2023-11-24 23:53:22,525 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_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c[5798,5811] [2023-11-24 23:53:22,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:53:22,693 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:53:22,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22 WrapperNode [2023-11-24 23:53:22,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:53:22,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:53:22,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:53:22,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:53:22,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,802 INFO L138 Inliner]: procedures = 94, calls = 353, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 944 [2023-11-24 23:53:22,802 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:53:22,803 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:53:22,803 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:53:22,803 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:53:22,813 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,823 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,852 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,931 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:53:22,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:53:22,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:53:22,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:53:22,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (1/1) ... [2023-11-24 23:53:22,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:53:22,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:23,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:53:23,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:53:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:53:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-24 23:53:23,094 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-24 23:53:23,094 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-24 23:53:23,095 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-24 23:53:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:53:23,096 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:53:23,096 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:53:23,097 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:53:23,097 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-24 23:53:23,097 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-24 23:53:23,098 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:53:23,099 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:53:23,099 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-24 23:53:23,099 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-24 23:53:23,099 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:53:23,102 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:53:23,102 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:53:23,102 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:53:23,102 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:53:23,102 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:53:23,102 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:53:23,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:53:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:53:23,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:53:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:53:23,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:53:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:53:23,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:53:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-24 23:53:23,104 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-24 23:53:23,104 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-24 23:53:23,104 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-24 23:53:23,104 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:53:23,104 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:53:23,105 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:53:23,105 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:53:23,105 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-24 23:53:23,105 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-24 23:53:23,105 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:53:23,105 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:53:23,105 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:53:23,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:53:23,106 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:53:23,106 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:53:23,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:53:23,106 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-24 23:53:23,106 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-24 23:53:23,106 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:53:23,107 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:53:23,108 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:53:23,108 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:53:23,108 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:53:23,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:53:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-24 23:53:23,109 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-24 23:53:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:53:23,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:53:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:53:23,110 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:53:23,336 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:53:23,339 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:53:24,609 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:53:25,585 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:53:25,586 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:53:25,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:53:25 BoogieIcfgContainer [2023-11-24 23:53:25,588 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:53:25,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:53:25,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:53:25,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:53:25,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:53:21" (1/3) ... [2023-11-24 23:53:25,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189f37f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:53:25, skipping insertion in model container [2023-11-24 23:53:25,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:22" (2/3) ... [2023-11-24 23:53:25,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189f37f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:53:25, skipping insertion in model container [2023-11-24 23:53:25,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:53:25" (3/3) ... [2023-11-24 23:53:25,602 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product23.cil.c [2023-11-24 23:53:25,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:53:25,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:53:25,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:53:25,726 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;@4d75266e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:53:25,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:53:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-24 23:53:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-24 23:53:25,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:25,774 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-24 23:53:25,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:25,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1522739840, now seen corresponding path program 1 times [2023-11-24 23:53:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:25,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476784339] [2023-11-24 23:53:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:25,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:53:27,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476784339] [2023-11-24 23:53:27,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476784339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679365099] [2023-11-24 23:53:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:27,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:27,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:27,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:27,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:53:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:27,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:53:27,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:53:27,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:27,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679365099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:27,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:27,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 23:53:27,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016987861] [2023-11-24 23:53:27,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:53:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:27,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:53:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:27,752 INFO L87 Difference]: Start difference. First operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:53:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:28,190 INFO L93 Difference]: Finished difference Result 1204 states and 1908 transitions. [2023-11-24 23:53:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:53:28,193 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2023-11-24 23:53:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:28,227 INFO L225 Difference]: With dead ends: 1204 [2023-11-24 23:53:28,227 INFO L226 Difference]: Without dead ends: 779 [2023-11-24 23:53:28,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:28,244 INFO L413 NwaCegarLoop]: 1118 mSDtfsCounter, 597 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:28,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1651 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:53:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-11-24 23:53:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 767. [2023-11-24 23:53:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 515 states have (on average 1.5475728155339805) internal successors, (797), 546 states have internal predecessors, (797), 201 states have call successors, (201), 51 states have call predecessors, (201), 50 states have return successors, (203), 195 states have call predecessors, (203), 198 states have call successors, (203) [2023-11-24 23:53:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1201 transitions. [2023-11-24 23:53:28,415 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1201 transitions. Word has length 87 [2023-11-24 23:53:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:28,417 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1201 transitions. [2023-11-24 23:53:28,420 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:53:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1201 transitions. [2023-11-24 23:53:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-24 23:53:28,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:28,433 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-24 23:53:28,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:28,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:53:28,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:28,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash 377848157, now seen corresponding path program 1 times [2023-11-24 23:53:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:28,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940387382] [2023-11-24 23:53:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:28,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:53:29,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:29,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940387382] [2023-11-24 23:53:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940387382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:29,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:29,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:53:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696747068] [2023-11-24 23:53:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:29,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:53:29,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:53:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:53:29,205 INFO L87 Difference]: Start difference. First operand 767 states and 1201 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:53:30,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:30,176 INFO L93 Difference]: Finished difference Result 2264 states and 3608 transitions. [2023-11-24 23:53:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:53:30,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2023-11-24 23:53:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:30,192 INFO L225 Difference]: With dead ends: 2264 [2023-11-24 23:53:30,192 INFO L226 Difference]: Without dead ends: 1509 [2023-11-24 23:53:30,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:30,200 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 648 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:30,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 3111 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:53:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2023-11-24 23:53:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1431. [2023-11-24 23:53:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 980 states have (on average 1.5561224489795917) internal successors, (1525), 1039 states have internal predecessors, (1525), 359 states have call successors, (359), 92 states have call predecessors, (359), 91 states have return successors, (392), 339 states have call predecessors, (392), 355 states have call successors, (392) [2023-11-24 23:53:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2276 transitions. [2023-11-24 23:53:30,322 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2276 transitions. Word has length 88 [2023-11-24 23:53:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:30,323 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 2276 transitions. [2023-11-24 23:53:30,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:53:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2276 transitions. [2023-11-24 23:53:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-24 23:53:30,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:30,329 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-24 23:53:30,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:53:30,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:30,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:30,330 INFO L85 PathProgramCache]: Analyzing trace with hash 818419288, now seen corresponding path program 1 times [2023-11-24 23:53:30,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:30,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595746322] [2023-11-24 23:53:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:30,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:53:30,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:30,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595746322] [2023-11-24 23:53:30,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595746322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:30,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819070839] [2023-11-24 23:53:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:30,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:30,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:30,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:53:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:31,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:53:31,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:53:31,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819070839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:31,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:31,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 23:53:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375670983] [2023-11-24 23:53:31,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:53:31,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:53:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:31,315 INFO L87 Difference]: Start difference. First operand 1431 states and 2276 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:53:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:31,633 INFO L93 Difference]: Finished difference Result 3526 states and 5679 transitions. [2023-11-24 23:53:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:53:31,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2023-11-24 23:53:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:31,660 INFO L225 Difference]: With dead ends: 3526 [2023-11-24 23:53:31,660 INFO L226 Difference]: Without dead ends: 2107 [2023-11-24 23:53:31,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:31,677 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 589 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:31,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1195 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:53:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2023-11-24 23:53:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2062. [2023-11-24 23:53:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1418 states have (on average 1.5585331452750353) internal successors, (2210), 1506 states have internal predecessors, (2210), 512 states have call successors, (512), 130 states have call predecessors, (512), 131 states have return successors, (568), 485 states have call predecessors, (568), 508 states have call successors, (568) [2023-11-24 23:53:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3290 transitions. [2023-11-24 23:53:31,854 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3290 transitions. Word has length 88 [2023-11-24 23:53:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:31,855 INFO L495 AbstractCegarLoop]: Abstraction has 2062 states and 3290 transitions. [2023-11-24 23:53:31,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:53:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3290 transitions. [2023-11-24 23:53:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 23:53:31,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:31,862 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-24 23:53:31,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:32,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:32,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:32,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1433691075, now seen corresponding path program 1 times [2023-11-24 23:53:32,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:32,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36598579] [2023-11-24 23:53:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:32,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:53:32,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:32,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36598579] [2023-11-24 23:53:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36598579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4878626] [2023-11-24 23:53:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:32,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:32,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:32,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:53:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:32,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:53:32,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:53:32,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4878626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:32,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 23:53:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485959119] [2023-11-24 23:53:32,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:53:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:53:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:32,867 INFO L87 Difference]: Start difference. First operand 2062 states and 3290 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:53:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:33,174 INFO L93 Difference]: Finished difference Result 4148 states and 6677 transitions. [2023-11-24 23:53:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:53:33,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2023-11-24 23:53:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:33,195 INFO L225 Difference]: With dead ends: 4148 [2023-11-24 23:53:33,195 INFO L226 Difference]: Without dead ends: 2098 [2023-11-24 23:53:33,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:33,217 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 20 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:33,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1216 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:53:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2023-11-24 23:53:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2090. [2023-11-24 23:53:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1442 states have (on average 1.552011095700416) internal successors, (2238), 1530 states have internal predecessors, (2238), 516 states have call successors, (516), 130 states have call predecessors, (516), 131 states have return successors, (572), 489 states have call predecessors, (572), 512 states have call successors, (572) [2023-11-24 23:53:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3326 transitions. [2023-11-24 23:53:33,406 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3326 transitions. Word has length 89 [2023-11-24 23:53:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:33,407 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 3326 transitions. [2023-11-24 23:53:33,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:53:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3326 transitions. [2023-11-24 23:53:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 23:53:33,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:33,414 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-24 23:53:33,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:33,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:33,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:33,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 174066735, now seen corresponding path program 1 times [2023-11-24 23:53:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:33,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179486351] [2023-11-24 23:53:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 23:53:33,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:33,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179486351] [2023-11-24 23:53:33,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179486351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:33,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200543878] [2023-11-24 23:53:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:33,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:33,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:33,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:34,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:53:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:34,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:53:34,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:53:34,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:34,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200543878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:34,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:34,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-24 23:53:34,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149214038] [2023-11-24 23:53:34,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:34,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:53:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:34,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:53:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:53:34,534 INFO L87 Difference]: Start difference. First operand 2090 states and 3326 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-24 23:53:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:35,676 INFO L93 Difference]: Finished difference Result 5585 states and 9075 transitions. [2023-11-24 23:53:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:53:35,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2023-11-24 23:53:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:35,711 INFO L225 Difference]: With dead ends: 5585 [2023-11-24 23:53:35,712 INFO L226 Difference]: Without dead ends: 3507 [2023-11-24 23:53:35,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:53:35,743 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 544 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:35,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 2832 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:53:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2023-11-24 23:53:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3474. [2023-11-24 23:53:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3474 states, 2387 states have (on average 1.4960201089233347) internal successors, (3571), 2536 states have internal predecessors, (3571), 859 states have call successors, (859), 232 states have call predecessors, (859), 227 states have return successors, (1007), 801 states have call predecessors, (1007), 853 states have call successors, (1007) [2023-11-24 23:53:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3474 states to 3474 states and 5437 transitions. [2023-11-24 23:53:36,076 INFO L78 Accepts]: Start accepts. Automaton has 3474 states and 5437 transitions. Word has length 89 [2023-11-24 23:53:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:36,077 INFO L495 AbstractCegarLoop]: Abstraction has 3474 states and 5437 transitions. [2023-11-24 23:53:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-24 23:53:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3474 states and 5437 transitions. [2023-11-24 23:53:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-24 23:53:36,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:36,082 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-24 23:53:36,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 23:53:36,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:36,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:36,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash -971047298, now seen corresponding path program 1 times [2023-11-24 23:53:36,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:36,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353974221] [2023-11-24 23:53:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:36,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:53:37,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:37,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353974221] [2023-11-24 23:53:37,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353974221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:37,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107293546] [2023-11-24 23:53:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:37,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:37,276 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:37,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:53:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:37,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 23:53:37,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:53:38,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:38,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107293546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:38,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:38,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-11-24 23:53:38,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656531812] [2023-11-24 23:53:38,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:38,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:53:38,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:38,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:53:38,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:53:38,031 INFO L87 Difference]: Start difference. First operand 3474 states and 5437 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-24 23:53:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:40,084 INFO L93 Difference]: Finished difference Result 7341 states and 11493 transitions. [2023-11-24 23:53:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:53:40,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2023-11-24 23:53:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:40,128 INFO L225 Difference]: With dead ends: 7341 [2023-11-24 23:53:40,129 INFO L226 Difference]: Without dead ends: 3879 [2023-11-24 23:53:40,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:53:40,167 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1389 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:40,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2026 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 23:53:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2023-11-24 23:53:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3858. [2023-11-24 23:53:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 2671 states have (on average 1.476974915761887) internal successors, (3945), 2828 states have internal predecessors, (3945), 931 states have call successors, (931), 264 states have call predecessors, (931), 255 states have return successors, (1087), 861 states have call predecessors, (1087), 925 states have call successors, (1087) [2023-11-24 23:53:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5963 transitions. [2023-11-24 23:53:40,557 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5963 transitions. Word has length 94 [2023-11-24 23:53:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:40,558 INFO L495 AbstractCegarLoop]: Abstraction has 3858 states and 5963 transitions. [2023-11-24 23:53:40,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-24 23:53:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5963 transitions. [2023-11-24 23:53:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-24 23:53:40,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:40,563 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-24 23:53:40,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:40,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:40,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:40,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1842824890, now seen corresponding path program 1 times [2023-11-24 23:53:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:40,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848080483] [2023-11-24 23:53:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:40,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:53:41,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:41,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848080483] [2023-11-24 23:53:41,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848080483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:41,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754507177] [2023-11-24 23:53:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:41,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:41,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:41,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:41,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:53:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:41,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:53:42,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:53:42,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:42,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754507177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:42,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:42,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-24 23:53:42,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781089081] [2023-11-24 23:53:42,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:42,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:53:42,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:53:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:53:42,079 INFO L87 Difference]: Start difference. First operand 3858 states and 5963 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:53:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:42,719 INFO L93 Difference]: Finished difference Result 7701 states and 12116 transitions. [2023-11-24 23:53:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:53:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 101 [2023-11-24 23:53:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:42,765 INFO L225 Difference]: With dead ends: 7701 [2023-11-24 23:53:42,765 INFO L226 Difference]: Without dead ends: 4708 [2023-11-24 23:53:42,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:53:42,783 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 141 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3789 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:42,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3789 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:53:42,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2023-11-24 23:53:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4291. [2023-11-24 23:53:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 2919 states have (on average 1.4693388146625557) internal successors, (4289), 3135 states have internal predecessors, (4289), 1101 states have call successors, (1101), 264 states have call predecessors, (1101), 270 states have return successors, (1303), 1029 states have call predecessors, (1303), 1095 states have call successors, (1303) [2023-11-24 23:53:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 6693 transitions. [2023-11-24 23:53:43,199 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 6693 transitions. Word has length 101 [2023-11-24 23:53:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:43,200 INFO L495 AbstractCegarLoop]: Abstraction has 4291 states and 6693 transitions. [2023-11-24 23:53:43,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:53:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 6693 transitions. [2023-11-24 23:53:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-24 23:53:43,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:43,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-11-24 23:53:43,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:43,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:43,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:43,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash -238397838, now seen corresponding path program 1 times [2023-11-24 23:53:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:43,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330865964] [2023-11-24 23:53:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 23:53:44,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330865964] [2023-11-24 23:53:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330865964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012673106] [2023-11-24 23:53:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:44,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:44,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:44,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:53:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:44,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 23:53:44,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:53:44,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:53:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-24 23:53:45,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012673106] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:45,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:53:45,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2023-11-24 23:53:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172294816] [2023-11-24 23:53:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:53:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:53:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-24 23:53:45,288 INFO L87 Difference]: Start difference. First operand 4291 states and 6693 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-24 23:53:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:49,731 INFO L93 Difference]: Finished difference Result 11549 states and 18906 transitions. [2023-11-24 23:53:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 23:53:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2023-11-24 23:53:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:49,844 INFO L225 Difference]: With dead ends: 11549 [2023-11-24 23:53:49,845 INFO L226 Difference]: Without dead ends: 8537 [2023-11-24 23:53:49,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 23:53:49,937 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 2005 mSDsluCounter, 2556 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:49,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2097 Valid, 3219 Invalid, 3265 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [894 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-24 23:53:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2023-11-24 23:53:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 7631. [2023-11-24 23:53:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7631 states, 5394 states have (on average 1.4740452354467928) internal successors, (7951), 5646 states have internal predecessors, (7951), 1679 states have call successors, (1679), 524 states have call predecessors, (1679), 557 states have return successors, (2457), 1604 states have call predecessors, (2457), 1671 states have call successors, (2457) [2023-11-24 23:53:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7631 states to 7631 states and 12087 transitions. [2023-11-24 23:53:50,620 INFO L78 Accepts]: Start accepts. Automaton has 7631 states and 12087 transitions. Word has length 103 [2023-11-24 23:53:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:50,621 INFO L495 AbstractCegarLoop]: Abstraction has 7631 states and 12087 transitions. [2023-11-24 23:53:50,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-24 23:53:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7631 states and 12087 transitions. [2023-11-24 23:53:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-24 23:53:50,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:50,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2023-11-24 23:53:50,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:50,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:50,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:50,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash 659236698, now seen corresponding path program 1 times [2023-11-24 23:53:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726643741] [2023-11-24 23:53:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:50,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 23:53:51,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:51,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726643741] [2023-11-24 23:53:51,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726643741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:51,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858870905] [2023-11-24 23:53:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:51,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:51,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:51,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:53:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:51,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:53:51,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:53:52,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:52,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858870905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:52,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:52,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-24 23:53:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448637136] [2023-11-24 23:53:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:52,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:53:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:53:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:53:52,133 INFO L87 Difference]: Start difference. First operand 7631 states and 12087 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-24 23:53:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:53,371 INFO L93 Difference]: Finished difference Result 13997 states and 22230 transitions. [2023-11-24 23:53:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:53:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2023-11-24 23:53:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:53,435 INFO L225 Difference]: With dead ends: 13997 [2023-11-24 23:53:53,435 INFO L226 Difference]: Without dead ends: 7653 [2023-11-24 23:53:53,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:53:53,474 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 448 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2434 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:53,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 2434 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:53:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2023-11-24 23:53:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 7631. [2023-11-24 23:53:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7631 states, 5394 states have (on average 1.4740452354467928) internal successors, (7951), 5646 states have internal predecessors, (7951), 1679 states have call successors, (1679), 524 states have call predecessors, (1679), 557 states have return successors, (2449), 1604 states have call predecessors, (2449), 1671 states have call successors, (2449) [2023-11-24 23:53:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7631 states to 7631 states and 12079 transitions. [2023-11-24 23:53:54,321 INFO L78 Accepts]: Start accepts. Automaton has 7631 states and 12079 transitions. Word has length 107 [2023-11-24 23:53:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:54,322 INFO L495 AbstractCegarLoop]: Abstraction has 7631 states and 12079 transitions. [2023-11-24 23:53:54,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-24 23:53:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7631 states and 12079 transitions. [2023-11-24 23:53:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-24 23:53:54,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:54,330 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:54,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:54,539 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:54,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash -73691742, now seen corresponding path program 1 times [2023-11-24 23:53:54,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:54,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649117740] [2023-11-24 23:53:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:54,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-24 23:53:55,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649117740] [2023-11-24 23:53:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649117740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035638164] [2023-11-24 23:53:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:55,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:55,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:55,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:53:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:55,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 23:53:55,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-24 23:53:56,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035638164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2023-11-24 23:53:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752926571] [2023-11-24 23:53:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:53:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:53:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:53:56,119 INFO L87 Difference]: Start difference. First operand 7631 states and 12079 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-24 23:53:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:57,892 INFO L93 Difference]: Finished difference Result 22385 states and 36867 transitions. [2023-11-24 23:53:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:53:57,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2023-11-24 23:53:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:57,995 INFO L225 Difference]: With dead ends: 22385 [2023-11-24 23:53:57,995 INFO L226 Difference]: Without dead ends: 14766 [2023-11-24 23:53:58,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:53:58,045 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 623 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 3035 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:58,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 3035 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:53:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14766 states. [2023-11-24 23:53:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14766 to 14549. [2023-11-24 23:53:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14549 states, 10377 states have (on average 1.4725835983424882) internal successors, (15281), 10852 states have internal predecessors, (15281), 3108 states have call successors, (3108), 997 states have call predecessors, (3108), 1063 states have return successors, (5328), 2927 states have call predecessors, (5328), 3096 states have call successors, (5328) [2023-11-24 23:53:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14549 states to 14549 states and 23717 transitions. [2023-11-24 23:53:59,488 INFO L78 Accepts]: Start accepts. Automaton has 14549 states and 23717 transitions. Word has length 134 [2023-11-24 23:53:59,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:59,489 INFO L495 AbstractCegarLoop]: Abstraction has 14549 states and 23717 transitions. [2023-11-24 23:53:59,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-24 23:53:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 14549 states and 23717 transitions. [2023-11-24 23:53:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-24 23:53:59,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:59,499 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:59,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:59,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c28ebe8-1fa8-45f2-97ae-4eb957af233a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:53:59,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:59,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1045213817, now seen corresponding path program 1 times [2023-11-24 23:53:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:59,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672874772] [2023-11-24 23:53:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-24 23:54:00,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672874772] [2023-11-24 23:54:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672874772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:00,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:54:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-24 23:54:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143091509] [2023-11-24 23:54:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:00,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 23:54:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 23:54:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:54:00,743 INFO L87 Difference]: Start difference. First operand 14549 states and 23717 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24)