./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/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_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/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_c7a6db06-3233-4a2a-ba61-9294979fe466/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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:21:17,536 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:21:17,650 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:21:17,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:21:17,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:21:17,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:21:17,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:21:17,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:21:17,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:21:17,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:21:17,709 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:21:17,710 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:21:17,710 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:21:17,712 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:21:17,712 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:21:17,713 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:21:17,713 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:21:17,714 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:21:17,714 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:21:17,715 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:21:17,715 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:21:17,716 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:21:17,717 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:21:17,718 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:21:17,718 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:21:17,718 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:21:17,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:21:17,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:21:17,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:21:17,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:21:17,722 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:21:17,722 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:21:17,722 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:21:17,723 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:21:17,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:21:17,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:21:17,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:21:17,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:17,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:21:17,725 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:21:17,725 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:21:17,726 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:21:17,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:21:17,726 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:21:17,727 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:21:17,727 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:21:17,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:21:17,728 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_c7a6db06-3233-4a2a-ba61-9294979fe466/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2023-11-24 23:21:18,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:21:18,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:21:18,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:21:18,052 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:21:18,053 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:21:18,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2023-11-24 23:21:21,158 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:21:21,533 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:21:21,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2023-11-24 23:21:21,574 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/data/9348e68d5/ecb1d2fe83b5423896d55f14947652bf/FLAG502ac9814 [2023-11-24 23:21:21,590 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/data/9348e68d5/ecb1d2fe83b5423896d55f14947652bf [2023-11-24 23:21:21,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:21:21,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:21:21,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:21,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:21:21,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:21:21,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:21" (1/1) ... [2023-11-24 23:21:21,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f58827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:21, skipping insertion in model container [2023-11-24 23:21:21,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:21:21" (1/1) ... [2023-11-24 23:21:21,711 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:21:22,228 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_c7a6db06-3233-4a2a-ba61-9294979fe466/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2023-11-24 23:21:22,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:22,331 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:21:22,342 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-11-24 23:21:22,343 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [412] [2023-11-24 23:21:22,344 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [532] [2023-11-24 23:21:22,344 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [567] [2023-11-24 23:21:22,345 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [755] [2023-11-24 23:21:22,345 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1426] [2023-11-24 23:21:22,346 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1518] [2023-11-24 23:21:22,346 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3108] [2023-11-24 23:21:22,346 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3117] [2023-11-24 23:21:22,346 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3130] [2023-11-24 23:21:22,512 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_c7a6db06-3233-4a2a-ba61-9294979fe466/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2023-11-24 23:21:22,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:21:22,558 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:21:22,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22 WrapperNode [2023-11-24 23:21:22,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:21:22,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:22,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:21:22,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:21:22,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,596 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,664 INFO L138 Inliner]: procedures = 97, calls = 349, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1166 [2023-11-24 23:21:22,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:21:22,665 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:21:22,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:21:22,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:21:22,676 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,683 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,717 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,792 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:21:22,799 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:21:22,800 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:21:22,800 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:21:22,801 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (1/1) ... [2023-11-24 23:21:22,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:21:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:22,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:21:22,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:21:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-24 23:21:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-24 23:21:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:21:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:21:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:21:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:21:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:21:22,885 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:21:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:21:22,885 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:21:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:21:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:21:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-24 23:21:22,887 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-24 23:21:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:21:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:21:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:21:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:21:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-24 23:21:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-24 23:21:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:21:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:21:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:21:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-24 23:21:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-24 23:21:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:21:22,892 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:21:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:21:22,892 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:21:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-24 23:21:22,893 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-24 23:21:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:21:22,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:21:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:21:22,893 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:21:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:21:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:21:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-24 23:21:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-24 23:21:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:21:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:21:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:21:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:21:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:21:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:21:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:21:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:21:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:21:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:21:22,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:21:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:21:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:21:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:21:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:21:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-24 23:21:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-24 23:21:23,105 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:21:23,108 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:21:24,376 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:21:25,369 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:21:25,370 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:21:25,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:25 BoogieIcfgContainer [2023-11-24 23:21:25,372 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:21:25,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:21:25,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:21:25,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:21:25,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:21:21" (1/3) ... [2023-11-24 23:21:25,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49deea98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:25, skipping insertion in model container [2023-11-24 23:21:25,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:21:22" (2/3) ... [2023-11-24 23:21:25,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49deea98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:21:25, skipping insertion in model container [2023-11-24 23:21:25,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:21:25" (3/3) ... [2023-11-24 23:21:25,383 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2023-11-24 23:21:25,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:21:25,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:21:25,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:21:25,498 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;@44bb1fba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:21:25,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:21:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-24 23:21:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:21:25,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:25,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:25,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:25,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2133254137, now seen corresponding path program 1 times [2023-11-24 23:21:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065165627] [2023-11-24 23:21:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:21:26,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:26,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065165627] [2023-11-24 23:21:26,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065165627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:26,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:26,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:21:26,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033423275] [2023-11-24 23:21:26,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:26,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:21:26,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:21:26,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:21:26,711 INFO L87 Difference]: Start difference. First operand has 390 states, 260 states have (on average 1.5846153846153845) internal successors, (412), 283 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-24 23:21:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:29,223 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2023-11-24 23:21:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:21:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2023-11-24 23:21:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:29,264 INFO L225 Difference]: With dead ends: 1260 [2023-11-24 23:21:29,265 INFO L226 Difference]: Without dead ends: 887 [2023-11-24 23:21:29,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:21:29,279 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1236 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:29,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 1021 Invalid, 1892 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [458 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 23:21:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-24 23:21:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2023-11-24 23:21:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 559 states have (on average 1.5992844364937389) internal successors, (894), 589 states have internal predecessors, (894), 195 states have call successors, (195), 44 states have call predecessors, (195), 45 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2023-11-24 23:21:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2023-11-24 23:21:29,497 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2023-11-24 23:21:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:29,498 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2023-11-24 23:21:29,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-24 23:21:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2023-11-24 23:21:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 23:21:29,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:29,517 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] [2023-11-24 23:21:29,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:21:29,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:29,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash 915277658, now seen corresponding path program 1 times [2023-11-24 23:21:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:29,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075326484] [2023-11-24 23:21:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:21:30,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:30,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075326484] [2023-11-24 23:21:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075326484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:30,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:30,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:21:30,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692021155] [2023-11-24 23:21:30,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:30,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:21:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:21:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:21:30,185 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-24 23:21:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:33,849 INFO L93 Difference]: Finished difference Result 2754 states and 4471 transitions. [2023-11-24 23:21:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 23:21:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 98 [2023-11-24 23:21:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:33,869 INFO L225 Difference]: With dead ends: 2754 [2023-11-24 23:21:33,870 INFO L226 Difference]: Without dead ends: 1977 [2023-11-24 23:21:33,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:21:33,885 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1367 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 4081 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 4743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 4081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:33,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2157 Invalid, 4743 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [662 Valid, 4081 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-24 23:21:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-11-24 23:21:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1790. [2023-11-24 23:21:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1214 states have (on average 1.57166392092257) internal successors, (1908), 1286 states have internal predecessors, (1908), 482 states have call successors, (482), 81 states have call predecessors, (482), 93 states have return successors, (501), 455 states have call predecessors, (501), 477 states have call successors, (501) [2023-11-24 23:21:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2891 transitions. [2023-11-24 23:21:34,097 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2891 transitions. Word has length 98 [2023-11-24 23:21:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:34,098 INFO L495 AbstractCegarLoop]: Abstraction has 1790 states and 2891 transitions. [2023-11-24 23:21:34,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-24 23:21:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2891 transitions. [2023-11-24 23:21:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 23:21:34,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:34,106 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] [2023-11-24 23:21:34,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:21:34,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:34,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash 272419514, now seen corresponding path program 1 times [2023-11-24 23:21:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:34,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244823357] [2023-11-24 23:21:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:34,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:21:34,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244823357] [2023-11-24 23:21:34,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244823357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:34,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:34,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:21:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236739486] [2023-11-24 23:21:34,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:34,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:21:34,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:21:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:21:34,735 INFO L87 Difference]: Start difference. First operand 1790 states and 2891 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-24 23:21:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:37,381 INFO L93 Difference]: Finished difference Result 4525 states and 7322 transitions. [2023-11-24 23:21:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:21:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2023-11-24 23:21:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:37,408 INFO L225 Difference]: With dead ends: 4525 [2023-11-24 23:21:37,408 INFO L226 Difference]: Without dead ends: 2760 [2023-11-24 23:21:37,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:21:37,422 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1165 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:37,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 1661 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 23:21:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2023-11-24 23:21:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2642. [2023-11-24 23:21:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1818 states have (on average 1.5792079207920793) internal successors, (2871), 1917 states have internal predecessors, (2871), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2023-11-24 23:21:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4262 transitions. [2023-11-24 23:21:37,667 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4262 transitions. Word has length 99 [2023-11-24 23:21:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:37,668 INFO L495 AbstractCegarLoop]: Abstraction has 2642 states and 4262 transitions. [2023-11-24 23:21:37,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-24 23:21:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4262 transitions. [2023-11-24 23:21:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-24 23:21:37,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:37,674 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, 1, 1] [2023-11-24 23:21:37,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:21:37,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:37,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2117017122, now seen corresponding path program 1 times [2023-11-24 23:21:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:37,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357373078] [2023-11-24 23:21:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:37,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:21:38,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357373078] [2023-11-24 23:21:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357373078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:38,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:38,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:21:38,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700970825] [2023-11-24 23:21:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:38,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:21:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:21:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:21:38,068 INFO L87 Difference]: Start difference. First operand 2642 states and 4262 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:21:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:38,975 INFO L93 Difference]: Finished difference Result 2743 states and 4428 transitions. [2023-11-24 23:21:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:21:38,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2023-11-24 23:21:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:38,995 INFO L225 Difference]: With dead ends: 2743 [2023-11-24 23:21:38,996 INFO L226 Difference]: Without dead ends: 2728 [2023-11-24 23:21:38,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:21:39,007 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 668 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:39,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1865 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:21:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2023-11-24 23:21:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2648. [2023-11-24 23:21:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1824 states have (on average 1.5773026315789473) internal successors, (2877), 1923 states have internal predecessors, (2877), 672 states have call successors, (672), 131 states have call predecessors, (672), 151 states have return successors, (719), 637 states have call predecessors, (719), 667 states have call successors, (719) [2023-11-24 23:21:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4268 transitions. [2023-11-24 23:21:39,255 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4268 transitions. Word has length 103 [2023-11-24 23:21:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:39,258 INFO L495 AbstractCegarLoop]: Abstraction has 2648 states and 4268 transitions. [2023-11-24 23:21:39,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:21:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4268 transitions. [2023-11-24 23:21:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-24 23:21:39,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:39,268 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:39,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:21:39,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:39,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:39,269 INFO L85 PathProgramCache]: Analyzing trace with hash 929609603, now seen corresponding path program 1 times [2023-11-24 23:21:39,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:39,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585719543] [2023-11-24 23:21:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:39,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:21:39,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:39,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585719543] [2023-11-24 23:21:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585719543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:39,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:21:39,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-24 23:21:39,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11559230] [2023-11-24 23:21:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:39,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 23:21:39,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 23:21:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:21:39,974 INFO L87 Difference]: Start difference. First operand 2648 states and 4268 transitions. Second operand has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-24 23:21:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:46,645 INFO L93 Difference]: Finished difference Result 3073 states and 4910 transitions. [2023-11-24 23:21:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-24 23:21:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 108 [2023-11-24 23:21:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:46,672 INFO L225 Difference]: With dead ends: 3073 [2023-11-24 23:21:46,672 INFO L226 Difference]: Without dead ends: 3056 [2023-11-24 23:21:46,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-11-24 23:21:46,677 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 2671 mSDsluCounter, 3383 mSDsCounter, 0 mSdLazyCounter, 7977 mSolverCounterSat, 1480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2697 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 9457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1480 IncrementalHoareTripleChecker+Valid, 7977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:46,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2697 Valid, 3930 Invalid, 9457 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1480 Valid, 7977 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-24 23:21:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2023-11-24 23:21:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2836. [2023-11-24 23:21:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 1966 states have (on average 1.5768056968463886) internal successors, (3100), 2063 states have internal predecessors, (3100), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2023-11-24 23:21:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4529 transitions. [2023-11-24 23:21:46,972 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4529 transitions. Word has length 108 [2023-11-24 23:21:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:46,973 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 4529 transitions. [2023-11-24 23:21:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-24 23:21:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4529 transitions. [2023-11-24 23:21:46,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-24 23:21:46,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:46,978 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:21:46,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:21:46,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:46,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2075843974, now seen corresponding path program 1 times [2023-11-24 23:21:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:46,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136493716] [2023-11-24 23:21:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:21:51,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136493716] [2023-11-24 23:21:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136493716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114585511] [2023-11-24 23:21:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:51,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:51,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:51,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:21:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:52,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:21:52,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:21:52,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:21:52,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114585511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:21:52,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:21:52,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [33] total 35 [2023-11-24 23:21:52,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665426083] [2023-11-24 23:21:52,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:21:52,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:21:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:21:52,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:21:52,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 23:21:52,573 INFO L87 Difference]: Start difference. First operand 2836 states and 4529 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-24 23:21:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:21:52,990 INFO L93 Difference]: Finished difference Result 2999 states and 4796 transitions. [2023-11-24 23:21:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:21:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2023-11-24 23:21:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:21:53,016 INFO L225 Difference]: With dead ends: 2999 [2023-11-24 23:21:53,017 INFO L226 Difference]: Without dead ends: 2984 [2023-11-24 23:21:53,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 23:21:53,022 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 47 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:21:53,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1764 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:21:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2023-11-24 23:21:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2850. [2023-11-24 23:21:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 1980 states have (on average 1.5727272727272728) internal successors, (3114), 2077 states have internal predecessors, (3114), 689 states have call successors, (689), 161 states have call predecessors, (689), 180 states have return successors, (740), 655 states have call predecessors, (740), 684 states have call successors, (740) [2023-11-24 23:21:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 4543 transitions. [2023-11-24 23:21:53,393 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 4543 transitions. Word has length 115 [2023-11-24 23:21:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:21:53,395 INFO L495 AbstractCegarLoop]: Abstraction has 2850 states and 4543 transitions. [2023-11-24 23:21:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-24 23:21:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 4543 transitions. [2023-11-24 23:21:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-24 23:21:53,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:21:53,402 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 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 23:21:53,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:21:53,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:21:53,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:21:53,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:21:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1850325784, now seen corresponding path program 1 times [2023-11-24 23:21:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:21:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559775094] [2023-11-24 23:21:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:21:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-24 23:21:55,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:21:55,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559775094] [2023-11-24 23:21:55,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559775094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:21:55,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544810925] [2023-11-24 23:21:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:21:55,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:21:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:21:55,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:21:55,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a6db06-3233-4a2a-ba61-9294979fe466/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:21:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:21:56,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-24 23:21:56,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:21:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:21:58,459 INFO L327 TraceCheckSpWp]: Computing backward predicates...