./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.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_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh --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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:45:03,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:45:03,360 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:45:03,364 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:45:03,365 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:45:03,397 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:45:03,398 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:45:03,398 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:45:03,399 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:45:03,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:45:03,400 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:45:03,400 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:45:03,401 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:45:03,401 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:45:03,402 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:45:03,402 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:45:03,403 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:45:03,403 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:45:03,404 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:45:03,404 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:45:03,405 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:45:03,405 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:45:03,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:45:03,406 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:45:03,407 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:45:03,407 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:45:03,408 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:45:03,408 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:45:03,408 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:45:03,409 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:45:03,409 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:45:03,409 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:45:03,410 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:45:03,410 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:45:03,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:45:03,410 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:45:03,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:45:03,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:45:03,411 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:45:03,411 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:45:03,411 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:45:03,412 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:45:03,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:45:03,412 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:45:03,412 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:45:03,412 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:45:03,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:45:03,413 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_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2023-12-02 13:45:03,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:45:03,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:45:03,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:45:03,656 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:45:03,656 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:45:03,657 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2023-12-02 13:45:06,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:45:06,599 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:45:06,599 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2023-12-02 13:45:06,621 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/data/4820c1ebe/91af5e4c18e243dc9af9c0a15091497e/FLAGb1c80e728 [2023-12-02 13:45:06,862 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/data/4820c1ebe/91af5e4c18e243dc9af9c0a15091497e [2023-12-02 13:45:06,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:45:06,865 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:45:06,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:45:06,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:45:06,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:45:06,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:45:06" (1/1) ... [2023-12-02 13:45:06,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6e7393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:06, skipping insertion in model container [2023-12-02 13:45:06,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:45:06" (1/1) ... [2023-12-02 13:45:06,958 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:45:07,269 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_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2023-12-02 13:45:07,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:45:07,381 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:45:07,388 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-12-02 13:45:07,389 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [412] [2023-12-02 13:45:07,389 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [447] [2023-12-02 13:45:07,390 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [567] [2023-12-02 13:45:07,390 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1239] [2023-12-02 13:45:07,390 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1252] [2023-12-02 13:45:07,390 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1618] [2023-12-02 13:45:07,390 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [1627] [2023-12-02 13:45:07,391 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1813] [2023-12-02 13:45:07,391 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1905] [2023-12-02 13:45:07,440 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_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2023-12-02 13:45:07,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:45:07,502 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:45:07,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07 WrapperNode [2023-12-02 13:45:07,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:45:07,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:45:07,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:45:07,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:45:07,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,579 INFO L138 Inliner]: procedures = 95, calls = 343, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1151 [2023-12-02 13:45:07,580 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:45:07,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:45:07,581 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:45:07,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:45:07,590 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,597 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,686 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:45:07,687 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:45:07,687 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:45:07,687 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:45:07,688 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (1/1) ... [2023-12-02 13:45:07,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:45:07,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:45:07,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:45:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:45:07,757 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 13:45:07,757 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 13:45:07,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:45:07,757 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 13:45:07,757 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 13:45:07,758 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 13:45:07,758 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 13:45:07,758 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 13:45:07,758 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 13:45:07,758 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-12-02 13:45:07,758 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-12-02 13:45:07,758 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 13:45:07,759 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 13:45:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 13:45:07,759 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 13:45:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 13:45:07,759 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 13:45:07,759 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 13:45:07,759 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 13:45:07,760 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 13:45:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 13:45:07,760 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 13:45:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 13:45:07,760 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 13:45:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 13:45:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 13:45:07,761 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 13:45:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 13:45:07,761 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 13:45:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 13:45:07,761 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 13:45:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 13:45:07,761 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 13:45:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 13:45:07,762 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 13:45:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 13:45:07,762 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 13:45:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 13:45:07,762 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 13:45:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 13:45:07,763 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 13:45:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 13:45:07,763 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 13:45:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:45:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 13:45:07,763 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 13:45:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 13:45:07,764 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 13:45:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 13:45:07,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 13:45:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:45:07,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:45:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 13:45:07,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 13:45:07,896 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:45:07,898 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:45:08,851 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:45:09,650 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:45:09,650 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:45:09,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:45:09 BoogieIcfgContainer [2023-12-02 13:45:09,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:45:09,654 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:45:09,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:45:09,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:45:09,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:45:06" (1/3) ... [2023-12-02 13:45:09,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e12e886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:45:09, skipping insertion in model container [2023-12-02 13:45:09,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:45:07" (2/3) ... [2023-12-02 13:45:09,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e12e886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:45:09, skipping insertion in model container [2023-12-02 13:45:09,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:45:09" (3/3) ... [2023-12-02 13:45:09,660 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2023-12-02 13:45:09,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:45:09,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:45:09,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:45:09,745 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;@2716946, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:45:09,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:45:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-02 13:45:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 13:45:09,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:09,775 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] [2023-12-02 13:45:09,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:45:09,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash 503731186, now seen corresponding path program 1 times [2023-12-02 13:45:09,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:09,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794870137] [2023-12-02 13:45:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:09,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 13:45:10,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794870137] [2023-12-02 13:45:10,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794870137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:45:10,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:45:10,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:45:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521133732] [2023-12-02 13:45:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:45:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:45:10,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:45:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:45:10,291 INFO L87 Difference]: Start difference. First operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) 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) [2023-12-02 13:45:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:10,429 INFO L93 Difference]: Finished difference Result 399 states and 630 transitions. [2023-12-02 13:45:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:45:10,431 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 [2023-12-02 13:45:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:10,449 INFO L225 Difference]: With dead ends: 399 [2023-12-02 13:45:10,449 INFO L226 Difference]: Without dead ends: 377 [2023-12-02 13:45:10,453 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 [2023-12-02 13:45:10,457 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:45:10,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 560 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:45:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-12-02 13:45:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2023-12-02 13:45:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 253 states have (on average 1.5770750988142292) internal successors, (399), 272 states have internal predecessors, (399), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-12-02 13:45:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 592 transitions. [2023-12-02 13:45:10,535 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 592 transitions. Word has length 88 [2023-12-02 13:45:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:10,537 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 592 transitions. [2023-12-02 13:45:10,537 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) [2023-12-02 13:45:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 592 transitions. [2023-12-02 13:45:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 13:45:10,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:10,544 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] [2023-12-02 13:45:10,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:45:10,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:45:10,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:10,545 INFO L85 PathProgramCache]: Analyzing trace with hash 955798233, now seen corresponding path program 1 times [2023-12-02 13:45:10,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:10,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137043740] [2023-12-02 13:45:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:10,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 13:45:11,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:11,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137043740] [2023-12-02 13:45:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137043740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:45:11,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:45:11,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:45:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837566715] [2023-12-02 13:45:11,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:45:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:45:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:11,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:45:11,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:45:11,106 INFO L87 Difference]: Start difference. First operand 377 states and 592 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) [2023-12-02 13:45:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:13,376 INFO L93 Difference]: Finished difference Result 1148 states and 1837 transitions. [2023-12-02 13:45:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:45:13,377 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 [2023-12-02 13:45:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:13,386 INFO L225 Difference]: With dead ends: 1148 [2023-12-02 13:45:13,386 INFO L226 Difference]: Without dead ends: 794 [2023-12-02 13:45:13,391 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 [2023-12-02 13:45:13,392 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1153 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:45:13,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1605 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 13:45:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-12-02 13:45:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 745. [2023-12-02 13:45:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 510 states have (on average 1.592156862745098) internal successors, (812), 543 states have internal predecessors, (812), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2023-12-02 13:45:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1191 transitions. [2023-12-02 13:45:13,481 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1191 transitions. Word has length 89 [2023-12-02 13:45:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:13,481 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1191 transitions. [2023-12-02 13:45:13,482 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) [2023-12-02 13:45:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1191 transitions. [2023-12-02 13:45:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 13:45:13,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:13,485 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] [2023-12-02 13:45:13,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:45:13,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:45:13,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash 560457816, now seen corresponding path program 1 times [2023-12-02 13:45:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404206844] [2023-12-02 13:45:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 13:45:13,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404206844] [2023-12-02 13:45:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404206844] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:45:13,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:45:13,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:45:13,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78126926] [2023-12-02 13:45:13,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:45:13,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:45:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:45:13,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:45:13,840 INFO L87 Difference]: Start difference. First operand 745 states and 1191 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) [2023-12-02 13:45:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:14,491 INFO L93 Difference]: Finished difference Result 816 states and 1303 transitions. [2023-12-02 13:45:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:45:14,492 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 [2023-12-02 13:45:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:14,500 INFO L225 Difference]: With dead ends: 816 [2023-12-02 13:45:14,500 INFO L226 Difference]: Without dead ends: 801 [2023-12-02 13:45:14,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:45:14,502 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 685 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:45:14,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1825 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:45:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2023-12-02 13:45:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 749. [2023-12-02 13:45:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.5875486381322956) internal successors, (816), 547 states have internal predecessors, (816), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2023-12-02 13:45:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1195 transitions. [2023-12-02 13:45:14,566 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1195 transitions. Word has length 93 [2023-12-02 13:45:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:14,566 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1195 transitions. [2023-12-02 13:45:14,567 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) [2023-12-02 13:45:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1195 transitions. [2023-12-02 13:45:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 13:45:14,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:14,570 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] [2023-12-02 13:45:14,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:45:14,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:45:14,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:14,571 INFO L85 PathProgramCache]: Analyzing trace with hash -47929335, now seen corresponding path program 1 times [2023-12-02 13:45:14,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:14,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482641759] [2023-12-02 13:45:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 13:45:14,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482641759] [2023-12-02 13:45:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482641759] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:45:14,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:45:14,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:45:14,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356011990] [2023-12-02 13:45:14,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:45:14,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:45:14,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:14,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:45:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:45:14,851 INFO L87 Difference]: Start difference. First operand 749 states and 1195 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2023-12-02 13:45:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:15,034 INFO L93 Difference]: Finished difference Result 768 states and 1219 transitions. [2023-12-02 13:45:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:45:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 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 [2023-12-02 13:45:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:15,042 INFO L225 Difference]: With dead ends: 768 [2023-12-02 13:45:15,042 INFO L226 Difference]: Without dead ends: 753 [2023-12-02 13:45:15,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:45:15,044 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 30 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:45:15,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2200 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:45:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-12-02 13:45:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 749. [2023-12-02 13:45:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.583657587548638) internal successors, (814), 547 states have internal predecessors, (814), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2023-12-02 13:45:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1193 transitions. [2023-12-02 13:45:15,102 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1193 transitions. Word has length 98 [2023-12-02 13:45:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:15,103 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1193 transitions. [2023-12-02 13:45:15,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2023-12-02 13:45:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1193 transitions. [2023-12-02 13:45:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-02 13:45:15,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:15,106 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] [2023-12-02 13:45:15,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:45:15,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:45:15,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1286960838, now seen corresponding path program 1 times [2023-12-02 13:45:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15068690] [2023-12-02 13:45:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:45:19,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15068690] [2023-12-02 13:45:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15068690] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:45:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989167799] [2023-12-02 13:45:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:19,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:45:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:45:19,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:45:19,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:45:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:19,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:45:19,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:45:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 13:45:19,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:45:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989167799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:45:19,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:45:19,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [29] total 31 [2023-12-02 13:45:19,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99184962] [2023-12-02 13:45:19,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:45:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:45:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:45:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2023-12-02 13:45:19,950 INFO L87 Difference]: Start difference. First operand 749 states and 1193 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) [2023-12-02 13:45:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:20,134 INFO L93 Difference]: Finished difference Result 832 states and 1317 transitions. [2023-12-02 13:45:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:45:20,135 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 [2023-12-02 13:45:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:20,142 INFO L225 Difference]: With dead ends: 832 [2023-12-02 13:45:20,142 INFO L226 Difference]: Without dead ends: 817 [2023-12-02 13:45:20,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2023-12-02 13:45:20,144 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 44 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1727 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 [2023-12-02 13:45:20,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1727 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:45:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-12-02 13:45:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 753. [2023-12-02 13:45:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 518 states have (on average 1.579150579150579) internal successors, (818), 551 states have internal predecessors, (818), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2023-12-02 13:45:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1197 transitions. [2023-12-02 13:45:20,186 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1197 transitions. Word has length 105 [2023-12-02 13:45:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:20,187 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 1197 transitions. [2023-12-02 13:45:20,187 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) [2023-12-02 13:45:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1197 transitions. [2023-12-02 13:45:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 13:45:20,189 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:20,189 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] [2023-12-02 13:45:20,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:45:20,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:45:20,390 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:45:20,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1332153102, now seen corresponding path program 1 times [2023-12-02 13:45:20,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:20,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137654392] [2023-12-02 13:45:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:20,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 13:45:21,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137654392] [2023-12-02 13:45:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137654392] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:45:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689672784] [2023-12-02 13:45:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:21,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:45:21,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:45:21,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:45:21,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01807a4b-c5e2-459a-b2f8-3498d0c39b4b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:45:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:22,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-02 13:45:22,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:45:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:45:23,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:47:19,901 WARN L293 SmtUtils]: Spent 1.79m on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 13:49:08,259 WARN L293 SmtUtils]: Spent 1.80m on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 13:49:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 13:49:09,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689672784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:49:09,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101635357] [2023-12-02 13:49:09,357 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2023-12-02 13:49:09,357 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:49:09,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:49:09,366 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:49:09,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:50:05,022 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 562 for LOIs [2023-12-02 13:50:07,453 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 582 for LOIs [2023-12-02 13:53:49,479 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2023-12-02 13:54:21,684 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 451 for LOIs [2023-12-02 13:54:28,481 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 452 for LOIs [2023-12-02 13:54:36,332 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2023-12-02 13:54:36,356 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2023-12-02 13:54:36,362 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2023-12-02 13:54:49,797 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 539 for LOIs [2023-12-02 13:54:53,300 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 470 for LOIs [2023-12-02 13:55:07,557 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 466 for LOIs [2023-12-02 13:55:08,928 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 552 for LOIs [2023-12-02 13:55:20,937 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 644 for LOIs [2023-12-02 13:55:26,011 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 521 for LOIs [2023-12-02 13:55:27,609 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:55:53,974 WARN L293 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 565 DAG size of output: 531 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:55:59,498 WARN L293 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 591 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:56:18,293 WARN L293 SmtUtils]: Spent 12.79s on a formula simplification. DAG size of input: 644 DAG size of output: 604 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:56:57,039 WARN L293 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 452 DAG size of output: 452 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:58:11,257 WARN L293 SmtUtils]: Spent 7.41s on a formula simplification that was a NOOP. DAG size: 617 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:58:19,116 WARN L293 SmtUtils]: Spent 6.93s on a formula simplification that was a NOOP. DAG size: 617 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:59:12,622 WARN L293 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 575 DAG size of output: 540 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:59:22,855 WARN L293 SmtUtils]: Spent 8.99s on a formula simplification. DAG size of input: 577 DAG size of output: 542 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)