./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.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_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/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_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/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_251cde17-186c-4a8b-a739-170650486414/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 be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:19:02,549 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:19:02,626 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:19:02,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:19:02,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:19:02,685 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:19:02,686 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:19:02,686 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:19:02,687 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:19:02,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:19:02,693 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:19:02,694 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:19:02,694 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:19:02,696 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:19:02,696 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:19:02,697 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:19:02,697 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:19:02,698 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:19:02,698 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:19:02,699 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:19:02,699 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:19:02,700 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:19:02,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:19:02,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:19:02,702 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:19:02,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:19:02,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:19:02,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:19:02,704 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:19:02,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:19:02,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:19:02,706 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:19:02,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:19:02,706 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:19:02,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:19:02,707 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:19:02,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:19:02,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:02,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:19:02,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:19:02,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:19:02,714 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:19:02,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:19:02,714 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:19:02,715 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:19:02,715 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:19:02,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:19:02,716 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_251cde17-186c-4a8b-a739-170650486414/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2023-11-24 23:19:03,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:19:03,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:19:03,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:19:03,130 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:19:03,130 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:19:03,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2023-11-24 23:19:06,261 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:19:06,715 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:19:06,718 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2023-11-24 23:19:06,754 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/data/85f187e46/cf696c4de47b49bc9e7765767701dc25/FLAG484215a08 [2023-11-24 23:19:06,771 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/data/85f187e46/cf696c4de47b49bc9e7765767701dc25 [2023-11-24 23:19:06,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:19:06,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:19:06,787 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:06,787 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:19:06,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:19:06,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:06" (1/1) ... [2023-11-24 23:19:06,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ede21e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:06, skipping insertion in model container [2023-11-24 23:19:06,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:06" (1/1) ... [2023-11-24 23:19:06,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:19:07,432 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_251cde17-186c-4a8b-a739-170650486414/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2023-11-24 23:19:07,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:07,480 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:19:07,494 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2023-11-24 23:19:07,496 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [150] [2023-11-24 23:19:07,497 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [516] [2023-11-24 23:19:07,497 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [700] [2023-11-24 23:19:07,498 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1055] [2023-11-24 23:19:07,498 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1175] [2023-11-24 23:19:07,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1188] [2023-11-24 23:19:07,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1223] [2023-11-24 23:19:07,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2820] [2023-11-24 23:19:07,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2829] [2023-11-24 23:19:07,673 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_251cde17-186c-4a8b-a739-170650486414/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2023-11-24 23:19:07,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:07,724 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:19:07,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07 WrapperNode [2023-11-24 23:19:07,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:07,726 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:07,726 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:19:07,726 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:19:07,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,840 INFO L138 Inliner]: procedures = 96, calls = 348, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 910 [2023-11-24 23:19:07,840 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:07,841 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:19:07,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:19:07,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:19:07,863 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,961 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,966 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,973 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:19:07,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:19:07,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:19:07,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:19:07,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (1/1) ... [2023-11-24 23:19:07,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:08,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:08,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:19:08,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:19:08,151 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-24 23:19:08,151 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-24 23:19:08,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:19:08,151 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-24 23:19:08,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-24 23:19:08,152 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:19:08,152 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:19:08,152 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-24 23:19:08,152 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-24 23:19:08,153 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:19:08,153 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:19:08,153 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-24 23:19:08,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-24 23:19:08,153 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:19:08,153 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:19:08,154 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:19:08,154 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:19:08,154 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:19:08,154 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:19:08,154 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:19:08,154 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:19:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-24 23:19:08,155 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-24 23:19:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:19:08,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:19:08,155 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:19:08,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:19:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:19:08,156 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:19:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:19:08,156 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:19:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-24 23:19:08,156 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-24 23:19:08,156 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:19:08,157 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:19:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:19:08,157 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:19:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:19:08,157 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:19:08,157 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:19:08,158 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:19:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:19:08,158 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:19:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:19:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-24 23:19:08,158 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-24 23:19:08,158 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:19:08,158 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:19:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:19:08,159 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:19:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:19:08,159 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:19:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-24 23:19:08,159 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-24 23:19:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:19:08,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:19:08,159 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:19:08,160 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:19:08,364 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:19:08,368 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:19:09,800 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:19:10,815 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:19:10,815 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:19:10,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:10 BoogieIcfgContainer [2023-11-24 23:19:10,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:19:10,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:19:10,820 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:19:10,823 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:19:10,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:19:06" (1/3) ... [2023-11-24 23:19:10,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d358b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:10, skipping insertion in model container [2023-11-24 23:19:10,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:07" (2/3) ... [2023-11-24 23:19:10,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d358b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:10, skipping insertion in model container [2023-11-24 23:19:10,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:10" (3/3) ... [2023-11-24 23:19:10,828 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2023-11-24 23:19:10,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:19:10,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:19:10,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:19:10,936 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;@4e94dc4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:19:10,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:19:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-24 23:19:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-24 23:19:10,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:10,983 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] [2023-11-24 23:19:10,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:10,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:10,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1792611175, now seen corresponding path program 1 times [2023-11-24 23:19:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082039256] [2023-11-24 23:19:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:11,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:11,609 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 23:19:11,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:11,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082039256] [2023-11-24 23:19:11,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082039256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:11,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:11,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:19:11,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946181865] [2023-11-24 23:19:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:11,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:19:11,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:19:11,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:19:11,671 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-24 23:19:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:11,896 INFO L93 Difference]: Finished difference Result 422 states and 661 transitions. [2023-11-24 23:19:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:19:11,903 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2023-11-24 23:19:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:11,922 INFO L225 Difference]: With dead ends: 422 [2023-11-24 23:19:11,922 INFO L226 Difference]: Without dead ends: 400 [2023-11-24 23:19:11,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:19:11,930 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:11,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 589 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:19:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-24 23:19:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2023-11-24 23:19:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 268 states have (on average 1.5597014925373134) internal successors, (418), 287 states have internal predecessors, (418), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-24 23:19:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 623 transitions. [2023-11-24 23:19:12,025 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 623 transitions. Word has length 88 [2023-11-24 23:19:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:12,028 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 623 transitions. [2023-11-24 23:19:12,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-24 23:19:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 623 transitions. [2023-11-24 23:19:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 23:19:12,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:12,039 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] [2023-11-24 23:19:12,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:19:12,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:12,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash 282478972, now seen corresponding path program 1 times [2023-11-24 23:19:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197793707] [2023-11-24 23:19:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:12,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:12,874 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 23:19:12,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:12,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197793707] [2023-11-24 23:19:12,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197793707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:12,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:12,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:19:12,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412635720] [2023-11-24 23:19:12,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:19:12,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:12,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:19:12,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:12,886 INFO L87 Difference]: Start difference. First operand 400 states and 623 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-24 23:19:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:15,852 INFO L93 Difference]: Finished difference Result 1217 states and 1930 transitions. [2023-11-24 23:19:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:19:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2023-11-24 23:19:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:15,861 INFO L225 Difference]: With dead ends: 1217 [2023-11-24 23:19:15,861 INFO L226 Difference]: Without dead ends: 840 [2023-11-24 23:19:15,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 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 23:19:15,870 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1216 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:15,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1605 Invalid, 2827 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [457 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-24 23:19:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-11-24 23:19:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2023-11-24 23:19:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 540 states have (on average 1.5740740740740742) internal successors, (850), 573 states have internal predecessors, (850), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-24 23:19:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1253 transitions. [2023-11-24 23:19:15,975 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1253 transitions. Word has length 89 [2023-11-24 23:19:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:15,978 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1253 transitions. [2023-11-24 23:19:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-24 23:19:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1253 transitions. [2023-11-24 23:19:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-24 23:19:15,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:15,986 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] [2023-11-24 23:19:15,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:19:15,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:15,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1266997725, now seen corresponding path program 1 times [2023-11-24 23:19:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:15,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978530893] [2023-11-24 23:19:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:16,507 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 23:19:16,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:16,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978530893] [2023-11-24 23:19:16,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978530893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:16,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:16,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:19:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730154285] [2023-11-24 23:19:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:19:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:19:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:16,512 INFO L87 Difference]: Start difference. First operand 791 states and 1253 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:19:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:17,092 INFO L93 Difference]: Finished difference Result 862 states and 1365 transitions. [2023-11-24 23:19:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2023-11-24 23:19:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:17,107 INFO L225 Difference]: With dead ends: 862 [2023-11-24 23:19:17,107 INFO L226 Difference]: Without dead ends: 847 [2023-11-24 23:19:17,114 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 23:19:17,118 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 715 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:17,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1540 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:17,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-11-24 23:19:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 795. [2023-11-24 23:19:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5698529411764706) internal successors, (854), 577 states have internal predecessors, (854), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-24 23:19:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1257 transitions. [2023-11-24 23:19:17,225 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1257 transitions. Word has length 93 [2023-11-24 23:19:17,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:17,229 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1257 transitions. [2023-11-24 23:19:17,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:19:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1257 transitions. [2023-11-24 23:19:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 23:19:17,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:17,235 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 23:19:17,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:19:17,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:17,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:17,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1545600453, now seen corresponding path program 1 times [2023-11-24 23:19:17,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:17,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236414910] [2023-11-24 23:19:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:17,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:17,735 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 23:19:17,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:17,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236414910] [2023-11-24 23:19:17,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236414910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:17,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:17,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:19:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110441074] [2023-11-24 23:19:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:19:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:19:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:17,738 INFO L87 Difference]: Start difference. First operand 795 states and 1257 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-24 23:19:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:17,950 INFO L93 Difference]: Finished difference Result 814 states and 1281 transitions. [2023-11-24 23:19:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:19:17,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2023-11-24 23:19:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:17,960 INFO L225 Difference]: With dead ends: 814 [2023-11-24 23:19:17,960 INFO L226 Difference]: Without dead ends: 799 [2023-11-24 23:19:17,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:17,971 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 41 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:17,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2891 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:19:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-24 23:19:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 795. [2023-11-24 23:19:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5661764705882353) internal successors, (852), 577 states have internal predecessors, (852), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-24 23:19:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1255 transitions. [2023-11-24 23:19:18,041 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1255 transitions. Word has length 98 [2023-11-24 23:19:18,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:18,041 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1255 transitions. [2023-11-24 23:19:18,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-24 23:19:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1255 transitions. [2023-11-24 23:19:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-24 23:19:18,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:18,047 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] [2023-11-24 23:19:18,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:19:18,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:18,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:18,048 INFO L85 PathProgramCache]: Analyzing trace with hash 804981927, now seen corresponding path program 1 times [2023-11-24 23:19:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:18,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274958652] [2023-11-24 23:19:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:21,208 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 23:19:21,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274958652] [2023-11-24 23:19:21,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274958652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929137518] [2023-11-24 23:19:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:21,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:21,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:21,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:19:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:21,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:19:21,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:21,781 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 23:19:21,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:21,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929137518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:21,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:19:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-11-24 23:19:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516787465] [2023-11-24 23:19:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:21,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:19:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:19:21,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:19:21,786 INFO L87 Difference]: Start difference. First operand 795 states and 1255 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2023-11-24 23:19:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:22,005 INFO L93 Difference]: Finished difference Result 878 states and 1379 transitions. [2023-11-24 23:19:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:22,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2023-11-24 23:19:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:22,014 INFO L225 Difference]: With dead ends: 878 [2023-11-24 23:19:22,014 INFO L226 Difference]: Without dead ends: 863 [2023-11-24 23:19:22,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:19:22,019 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 44 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:22,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1814 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:19:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-11-24 23:19:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 799. [2023-11-24 23:19:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 548 states have (on average 1.562043795620438) internal successors, (856), 581 states have internal predecessors, (856), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-24 23:19:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2023-11-24 23:19:22,113 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 105 [2023-11-24 23:19:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:22,114 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2023-11-24 23:19:22,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2023-11-24 23:19:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2023-11-24 23:19:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-24 23:19:22,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:22,120 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] [2023-11-24 23:19:22,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:22,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:22,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:22,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash 903499730, now seen corresponding path program 1 times [2023-11-24 23:19:22,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193789731] [2023-11-24 23:19:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:22,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:24,183 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 23:19:24,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:24,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193789731] [2023-11-24 23:19:24,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193789731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:24,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982299606] [2023-11-24 23:19:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:24,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:24,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:24,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:24,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251cde17-186c-4a8b-a739-170650486414/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:19:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:24,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-24 23:19:24,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:26,722 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 23:19:26,723 INFO L327 TraceCheckSpWp]: Computing backward predicates...