./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.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_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/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_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/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_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/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 d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:36:50,293 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:36:50,358 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:36:50,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:36:50,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:36:50,387 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:36:50,388 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:36:50,388 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:36:50,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:36:50,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:36:50,390 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:36:50,391 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:36:50,391 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:36:50,392 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:36:50,392 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:36:50,392 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:36:50,393 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:36:50,393 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:36:50,394 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:36:50,394 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:36:50,395 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:36:50,396 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:36:50,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:36:50,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:36:50,397 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:36:50,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:36:50,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:36:50,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:36:50,399 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:36:50,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:36:50,400 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:36:50,400 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:36:50,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:36:50,401 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:36:50,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:36:50,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:36:50,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:36:50,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:36:50,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:36:50,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:36:50,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:36:50,403 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:36:50,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:36:50,403 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:36:50,403 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:36:50,403 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:36:50,404 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:36:50,404 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_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5d3c0f581b3d52ccfb3e43d6fb6458a66cd40c307750c0d7336040b60b78e76 [2023-12-02 17:36:50,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:36:50,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:36:50,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:36:50,644 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:36:50,644 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:36:50,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2023-12-02 17:36:53,465 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:36:53,751 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:36:53,752 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c [2023-12-02 17:36:53,775 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/data/889d0011a/b2c830d4f1c94c4885f340c175593321/FLAG2b120316e [2023-12-02 17:36:53,791 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/data/889d0011a/b2c830d4f1c94c4885f340c175593321 [2023-12-02 17:36:53,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:36:53,795 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:36:53,797 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:36:53,797 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:36:53,802 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:36:53,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:36:53" (1/1) ... [2023-12-02 17:36:53,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5208ca4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:53, skipping insertion in model container [2023-12-02 17:36:53,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:36:53" (1/1) ... [2023-12-02 17:36:53,892 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:36:54,268 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_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2023-12-02 17:36:54,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:36:54,357 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:36:54,368 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-12-02 17:36:54,369 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [414] [2023-12-02 17:36:54,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [428] [2023-12-02 17:36:54,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [594] [2023-12-02 17:36:54,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2119] [2023-12-02 17:36:54,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2128] [2023-12-02 17:36:54,371 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2790] [2023-12-02 17:36:54,371 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3145] [2023-12-02 17:36:54,371 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3236] [2023-12-02 17:36:54,371 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3271] [2023-12-02 17:36:54,469 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_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/sv-benchmarks/c/product-lines/elevator_spec9_product26.cil.c[46529,46542] [2023-12-02 17:36:54,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:36:54,512 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:36:54,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54 WrapperNode [2023-12-02 17:36:54,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:36:54,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:36:54,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:36:54,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:36:54,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,578 INFO L138 Inliner]: procedures = 93, calls = 337, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 813 [2023-12-02 17:36:54,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:36:54,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:36:54,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:36:54,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:36:54,587 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,643 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,653 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:36:54,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:36:54,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:36:54,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:36:54,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (1/1) ... [2023-12-02 17:36:54,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:36:54,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:54,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:36:54,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:36:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:36:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 17:36:54,730 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 17:36:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 17:36:54,730 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 17:36:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 17:36:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 17:36:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 17:36:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 17:36:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 17:36:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 17:36:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 17:36:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 17:36:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 17:36:54,732 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 17:36:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 17:36:54,732 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 17:36:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 17:36:54,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 17:36:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 17:36:54,733 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 17:36:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 17:36:54,733 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 17:36:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 17:36:54,733 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 17:36:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 17:36:54,733 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 17:36:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 17:36:54,734 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 17:36:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-12-02 17:36:54,734 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-12-02 17:36:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 17:36:54,734 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 17:36:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 17:36:54,734 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 17:36:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 17:36:54,735 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 17:36:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-12-02 17:36:54,735 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-12-02 17:36:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:36:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 17:36:54,735 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 17:36:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 17:36:54,735 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 17:36:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 17:36:54,736 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 17:36:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:36:54,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:36:54,736 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 17:36:54,736 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 17:36:54,891 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:36:54,893 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:36:55,835 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:36:56,715 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:36:56,715 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:36:56,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:36:56 BoogieIcfgContainer [2023-12-02 17:36:56,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:36:56,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:36:56,720 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:36:56,723 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:36:56,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:36:53" (1/3) ... [2023-12-02 17:36:56,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ae825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:36:56, skipping insertion in model container [2023-12-02 17:36:56,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:54" (2/3) ... [2023-12-02 17:36:56,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ae825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:36:56, skipping insertion in model container [2023-12-02 17:36:56,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:36:56" (3/3) ... [2023-12-02 17:36:56,725 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2023-12-02 17:36:56,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:36:56,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:36:56,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:36:56,814 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;@2e6e95c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:36:56,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:36:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 351 states, 237 states have (on average 1.6118143459915613) internal successors, (382), 260 states have internal predecessors, (382), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-02 17:36:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 17:36:56,836 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:56,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:36:56,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:56,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash -915793724, now seen corresponding path program 1 times [2023-12-02 17:36:56,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:56,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645560837] [2023-12-02 17:36:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:56,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:57,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:57,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645560837] [2023-12-02 17:36:57,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645560837] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:57,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:57,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:36:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254015953] [2023-12-02 17:36:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:57,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:36:57,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:36:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:36:57,270 INFO L87 Difference]: Start difference. First operand has 351 states, 237 states have (on average 1.6118143459915613) internal successors, (382), 260 states have internal predecessors, (382), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (89), 82 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 17:36:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:57,418 INFO L93 Difference]: Finished difference Result 369 states and 587 transitions. [2023-12-02 17:36:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:36:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 39 [2023-12-02 17:36:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:57,436 INFO L225 Difference]: With dead ends: 369 [2023-12-02 17:36:57,436 INFO L226 Difference]: Without dead ends: 347 [2023-12-02 17:36:57,440 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 17:36:57,443 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:57,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 516 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-12-02 17:36:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2023-12-02 17:36:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 235 states have (on average 1.6) internal successors, (376), 256 states have internal predecessors, (376), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 81 states have call predecessors, (84), 84 states have call successors, (84) [2023-12-02 17:36:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 549 transitions. [2023-12-02 17:36:57,516 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 549 transitions. Word has length 39 [2023-12-02 17:36:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:57,517 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 549 transitions. [2023-12-02 17:36:57,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 17:36:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 549 transitions. [2023-12-02 17:36:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 17:36:57,522 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:57,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:36:57,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:36:57,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:57,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1832338948, now seen corresponding path program 1 times [2023-12-02 17:36:57,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:57,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873486400] [2023-12-02 17:36:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:57,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:57,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:57,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873486400] [2023-12-02 17:36:57,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873486400] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:57,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:57,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:36:57,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634930966] [2023-12-02 17:36:57,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:57,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:36:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:36:57,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:36:57,939 INFO L87 Difference]: Start difference. First operand 347 states and 549 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 17:37:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:00,073 INFO L93 Difference]: Finished difference Result 1123 states and 1814 transitions. [2023-12-02 17:37:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:37:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 40 [2023-12-02 17:37:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:00,083 INFO L225 Difference]: With dead ends: 1123 [2023-12-02 17:37:00,084 INFO L226 Difference]: Without dead ends: 792 [2023-12-02 17:37:00,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:37:00,090 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1827 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:00,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1884 Valid, 673 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 17:37:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-12-02 17:37:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 695. [2023-12-02 17:37:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 491 states have (on average 1.6191446028513239) internal successors, (795), 521 states have internal predecessors, (795), 163 states have call successors, (163), 39 states have call predecessors, (163), 40 states have return successors, (165), 147 states have call predecessors, (165), 158 states have call successors, (165) [2023-12-02 17:37:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1123 transitions. [2023-12-02 17:37:00,170 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1123 transitions. Word has length 40 [2023-12-02 17:37:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:00,171 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1123 transitions. [2023-12-02 17:37:00,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 17:37:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1123 transitions. [2023-12-02 17:37:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 17:37:00,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:00,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:37:00,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:37:00,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:00,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1059287074, now seen corresponding path program 1 times [2023-12-02 17:37:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:00,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532454977] [2023-12-02 17:37:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:37:00,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:00,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532454977] [2023-12-02 17:37:00,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532454977] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:00,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:00,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:37:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503610264] [2023-12-02 17:37:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:37:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:37:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:37:00,623 INFO L87 Difference]: Start difference. First operand 695 states and 1123 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 17:37:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:02,698 INFO L93 Difference]: Finished difference Result 2349 states and 3843 transitions. [2023-12-02 17:37:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:37:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2023-12-02 17:37:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:02,715 INFO L225 Difference]: With dead ends: 2349 [2023-12-02 17:37:02,715 INFO L226 Difference]: Without dead ends: 1671 [2023-12-02 17:37:02,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:37:02,722 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1609 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:02,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 1489 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:37:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2023-12-02 17:37:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1602. [2023-12-02 17:37:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1161 states have (on average 1.6391042204995694) internal successors, (1903), 1221 states have internal predecessors, (1903), 348 states have call successors, (348), 81 states have call predecessors, (348), 92 states have return successors, (375), 323 states have call predecessors, (375), 343 states have call successors, (375) [2023-12-02 17:37:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2626 transitions. [2023-12-02 17:37:02,870 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2626 transitions. Word has length 62 [2023-12-02 17:37:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:02,870 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2626 transitions. [2023-12-02 17:37:02,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 17:37:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2626 transitions. [2023-12-02 17:37:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 17:37:02,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:02,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:37:02,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:37:02,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:02,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1407886496, now seen corresponding path program 1 times [2023-12-02 17:37:02,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:02,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456559440] [2023-12-02 17:37:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:02,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:37:03,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456559440] [2023-12-02 17:37:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456559440] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:03,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:03,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:37:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518178000] [2023-12-02 17:37:03,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:03,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:37:03,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:03,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:37:03,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:37:03,281 INFO L87 Difference]: Start difference. First operand 1602 states and 2626 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-02 17:37:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:05,933 INFO L93 Difference]: Finished difference Result 4375 states and 7183 transitions. [2023-12-02 17:37:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:37:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 65 [2023-12-02 17:37:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:05,960 INFO L225 Difference]: With dead ends: 4375 [2023-12-02 17:37:05,960 INFO L226 Difference]: Without dead ends: 2789 [2023-12-02 17:37:05,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:37:05,974 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 1198 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 3688 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 3688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:05,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1792 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 3688 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 17:37:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2023-12-02 17:37:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2636. [2023-12-02 17:37:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 1882 states have (on average 1.626461211477152) internal successors, (3061), 1985 states have internal predecessors, (3061), 608 states have call successors, (608), 121 states have call predecessors, (608), 145 states have return successors, (653), 574 states have call predecessors, (653), 603 states have call successors, (653) [2023-12-02 17:37:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4322 transitions. [2023-12-02 17:37:06,226 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4322 transitions. Word has length 65 [2023-12-02 17:37:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:06,227 INFO L495 AbstractCegarLoop]: Abstraction has 2636 states and 4322 transitions. [2023-12-02 17:37:06,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-02 17:37:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4322 transitions. [2023-12-02 17:37:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 17:37:06,230 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:06,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:37:06,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:37:06,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:06,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash -735888399, now seen corresponding path program 1 times [2023-12-02 17:37:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:06,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390068266] [2023-12-02 17:37:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:37:06,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:06,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390068266] [2023-12-02 17:37:06,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390068266] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:06,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:06,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:37:06,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964311701] [2023-12-02 17:37:06,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:06,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:37:06,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:06,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:37:06,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:37:06,415 INFO L87 Difference]: Start difference. First operand 2636 states and 4322 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 17:37:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:06,693 INFO L93 Difference]: Finished difference Result 4674 states and 7681 transitions. [2023-12-02 17:37:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:37:06,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2023-12-02 17:37:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:06,708 INFO L225 Difference]: With dead ends: 4674 [2023-12-02 17:37:06,708 INFO L226 Difference]: Without dead ends: 2700 [2023-12-02 17:37:06,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:37:06,717 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 7 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:06,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2027 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:37:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2023-12-02 17:37:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2676. [2023-12-02 17:37:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 1912 states have (on average 1.61663179916318) internal successors, (3091), 2015 states have internal predecessors, (3091), 608 states have call successors, (608), 121 states have call predecessors, (608), 155 states have return successors, (673), 584 states have call predecessors, (673), 603 states have call successors, (673) [2023-12-02 17:37:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4372 transitions. [2023-12-02 17:37:06,848 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4372 transitions. Word has length 66 [2023-12-02 17:37:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:06,849 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 4372 transitions. [2023-12-02 17:37:06,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 17:37:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4372 transitions. [2023-12-02 17:37:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:37:06,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:06,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:37:06,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:37:06,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:06,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash 713717017, now seen corresponding path program 1 times [2023-12-02 17:37:06,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:06,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71741768] [2023-12-02 17:37:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:37:07,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:07,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71741768] [2023-12-02 17:37:07,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71741768] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:07,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:07,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:37:07,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423979384] [2023-12-02 17:37:07,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:07,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:37:07,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:37:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:37:07,148 INFO L87 Difference]: Start difference. First operand 2676 states and 4372 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 17:37:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:09,246 INFO L93 Difference]: Finished difference Result 6610 states and 10814 transitions. [2023-12-02 17:37:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:37:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 70 [2023-12-02 17:37:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:09,281 INFO L225 Difference]: With dead ends: 6610 [2023-12-02 17:37:09,281 INFO L226 Difference]: Without dead ends: 4404 [2023-12-02 17:37:09,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:37:09,295 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 2707 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2844 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:09,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2844 Valid, 1012 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:37:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2023-12-02 17:37:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 4296. [2023-12-02 17:37:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 3003 states have (on average 1.57009657009657) internal successors, (4715), 3184 states have internal predecessors, (4715), 1017 states have call successors, (1017), 215 states have call predecessors, (1017), 275 states have return successors, (1153), 974 states have call predecessors, (1153), 1012 states have call successors, (1153) [2023-12-02 17:37:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6885 transitions. [2023-12-02 17:37:09,686 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6885 transitions. Word has length 70 [2023-12-02 17:37:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:09,686 INFO L495 AbstractCegarLoop]: Abstraction has 4296 states and 6885 transitions. [2023-12-02 17:37:09,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 17:37:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6885 transitions. [2023-12-02 17:37:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:37:09,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:09,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:37:09,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:37:09,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:09,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1871223060, now seen corresponding path program 1 times [2023-12-02 17:37:09,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:09,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978086610] [2023-12-02 17:37:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:37:10,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:10,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978086610] [2023-12-02 17:37:10,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978086610] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:10,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:10,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 17:37:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579592977] [2023-12-02 17:37:10,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:10,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:37:10,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:37:10,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:37:10,048 INFO L87 Difference]: Start difference. First operand 4296 states and 6885 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 17:37:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:13,347 INFO L93 Difference]: Finished difference Result 8821 states and 14379 transitions. [2023-12-02 17:37:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:37:13,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 73 [2023-12-02 17:37:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:13,399 INFO L225 Difference]: With dead ends: 8821 [2023-12-02 17:37:13,400 INFO L226 Difference]: Without dead ends: 4455 [2023-12-02 17:37:13,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:37:13,428 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1899 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 2920 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:13,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1917 Valid, 2920 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 17:37:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2023-12-02 17:37:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 4317. [2023-12-02 17:37:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 3014 states have (on average 1.528533510285335) internal successors, (4607), 3195 states have internal predecessors, (4607), 1019 states have call successors, (1019), 223 states have call predecessors, (1019), 283 states have return successors, (1155), 975 states have call predecessors, (1155), 1014 states have call successors, (1155) [2023-12-02 17:37:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 6781 transitions. [2023-12-02 17:37:13,834 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 6781 transitions. Word has length 73 [2023-12-02 17:37:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:13,834 INFO L495 AbstractCegarLoop]: Abstraction has 4317 states and 6781 transitions. [2023-12-02 17:37:13,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 7 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 17:37:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 6781 transitions. [2023-12-02 17:37:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:37:13,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:13,838 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:13,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:37:13,838 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:13,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 841752789, now seen corresponding path program 1 times [2023-12-02 17:37:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:13,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841957222] [2023-12-02 17:37:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:13,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:37:14,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:14,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841957222] [2023-12-02 17:37:14,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841957222] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:14,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:14,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:37:14,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53705581] [2023-12-02 17:37:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:14,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:37:14,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:14,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:37:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:37:14,148 INFO L87 Difference]: Start difference. First operand 4317 states and 6781 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, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 17:37:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:15,643 INFO L93 Difference]: Finished difference Result 8482 states and 13353 transitions. [2023-12-02 17:37:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:37:15,644 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, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2023-12-02 17:37:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:15,668 INFO L225 Difference]: With dead ends: 8482 [2023-12-02 17:37:15,668 INFO L226 Difference]: Without dead ends: 4749 [2023-12-02 17:37:15,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:37:15,687 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 894 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:15,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 1388 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 17:37:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2023-12-02 17:37:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 4407. [2023-12-02 17:37:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 3074 states have (on average 1.5227716330513987) internal successors, (4681), 3269 states have internal predecessors, (4681), 1021 states have call successors, (1021), 239 states have call predecessors, (1021), 311 states have return successors, (1193), 975 states have call predecessors, (1193), 1016 states have call successors, (1193) [2023-12-02 17:37:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 6895 transitions. [2023-12-02 17:37:16,057 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 6895 transitions. Word has length 75 [2023-12-02 17:37:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:16,058 INFO L495 AbstractCegarLoop]: Abstraction has 4407 states and 6895 transitions. [2023-12-02 17:37:16,058 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, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 17:37:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 6895 transitions. [2023-12-02 17:37:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 17:37:16,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:16,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:16,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:37:16,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:16,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash -344343086, now seen corresponding path program 1 times [2023-12-02 17:37:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:16,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449466150] [2023-12-02 17:37:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:16,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:37:16,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:16,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449466150] [2023-12-02 17:37:16,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449466150] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:16,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:16,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:37:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589582639] [2023-12-02 17:37:16,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:16,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:37:16,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:37:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:37:16,294 INFO L87 Difference]: Start difference. First operand 4407 states and 6895 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 17:37:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:16,898 INFO L93 Difference]: Finished difference Result 4509 states and 7061 transitions. [2023-12-02 17:37:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:37:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 79 [2023-12-02 17:37:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:16,924 INFO L225 Difference]: With dead ends: 4509 [2023-12-02 17:37:16,924 INFO L226 Difference]: Without dead ends: 4494 [2023-12-02 17:37:16,927 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 [2023-12-02 17:37:16,928 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 632 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:16,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1323 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:37:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2023-12-02 17:37:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4413. [2023-12-02 17:37:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 3080 states have (on average 1.5217532467532469) internal successors, (4687), 3275 states have internal predecessors, (4687), 1021 states have call successors, (1021), 239 states have call predecessors, (1021), 311 states have return successors, (1193), 975 states have call predecessors, (1193), 1016 states have call successors, (1193) [2023-12-02 17:37:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 6901 transitions. [2023-12-02 17:37:17,246 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 6901 transitions. Word has length 79 [2023-12-02 17:37:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:17,247 INFO L495 AbstractCegarLoop]: Abstraction has 4413 states and 6901 transitions. [2023-12-02 17:37:17,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 17:37:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 6901 transitions. [2023-12-02 17:37:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 17:37:17,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:17,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:37:17,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:17,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash 483710964, now seen corresponding path program 1 times [2023-12-02 17:37:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:17,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793083549] [2023-12-02 17:37:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:17,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:37:17,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793083549] [2023-12-02 17:37:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793083549] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:17,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:17,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 17:37:17,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532884695] [2023-12-02 17:37:17,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:17,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:37:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:37:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:37:17,717 INFO L87 Difference]: Start difference. First operand 4413 states and 6901 transitions. Second operand has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 17:37:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:21,566 INFO L93 Difference]: Finished difference Result 4987 states and 7785 transitions. [2023-12-02 17:37:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 17:37:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 87 [2023-12-02 17:37:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:21,585 INFO L225 Difference]: With dead ends: 4987 [2023-12-02 17:37:21,586 INFO L226 Difference]: Without dead ends: 4970 [2023-12-02 17:37:21,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:37:21,589 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 2348 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 6436 mSolverCounterSat, 1234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2371 SdHoareTripleChecker+Valid, 3358 SdHoareTripleChecker+Invalid, 7670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1234 IncrementalHoareTripleChecker+Valid, 6436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:21,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2371 Valid, 3358 Invalid, 7670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1234 Valid, 6436 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 17:37:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2023-12-02 17:37:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 4717. [2023-12-02 17:37:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 3322 states have (on average 1.5319084888621313) internal successors, (5089), 3515 states have internal predecessors, (5089), 1042 states have call successors, (1042), 281 states have call predecessors, (1042), 352 states have return successors, (1218), 997 states have call predecessors, (1218), 1037 states have call successors, (1218) [2023-12-02 17:37:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 7349 transitions. [2023-12-02 17:37:21,935 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 7349 transitions. Word has length 87 [2023-12-02 17:37:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:21,936 INFO L495 AbstractCegarLoop]: Abstraction has 4717 states and 7349 transitions. [2023-12-02 17:37:21,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 5 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 17:37:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 7349 transitions. [2023-12-02 17:37:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 17:37:21,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:21,939 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:21,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 17:37:21,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:21,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash -130156535, now seen corresponding path program 1 times [2023-12-02 17:37:21,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:21,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282417073] [2023-12-02 17:37:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:37:22,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:22,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282417073] [2023-12-02 17:37:22,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282417073] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:22,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:22,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:37:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480373885] [2023-12-02 17:37:22,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:22,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:37:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:37:22,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:22,029 INFO L87 Difference]: Start difference. First operand 4717 states and 7349 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 17:37:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:22,621 INFO L93 Difference]: Finished difference Result 12060 states and 18919 transitions. [2023-12-02 17:37:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:37:22,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2023-12-02 17:37:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:22,661 INFO L225 Difference]: With dead ends: 12060 [2023-12-02 17:37:22,661 INFO L226 Difference]: Without dead ends: 7363 [2023-12-02 17:37:22,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:22,683 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 495 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:22,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1045 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:37:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7363 states. [2023-12-02 17:37:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7363 to 7272. [2023-12-02 17:37:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7272 states, 5136 states have (on average 1.5292056074766356) internal successors, (7854), 5447 states have internal predecessors, (7854), 1595 states have call successors, (1595), 425 states have call predecessors, (1595), 540 states have return successors, (1921), 1511 states have call predecessors, (1921), 1590 states have call successors, (1921) [2023-12-02 17:37:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7272 states to 7272 states and 11370 transitions. [2023-12-02 17:37:23,224 INFO L78 Accepts]: Start accepts. Automaton has 7272 states and 11370 transitions. Word has length 91 [2023-12-02 17:37:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:23,224 INFO L495 AbstractCegarLoop]: Abstraction has 7272 states and 11370 transitions. [2023-12-02 17:37:23,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 17:37:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7272 states and 11370 transitions. [2023-12-02 17:37:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 17:37:23,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:23,227 INFO L195 NwaCegarLoop]: trace histogram [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 17:37:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:37:23,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:23,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1962961145, now seen corresponding path program 1 times [2023-12-02 17:37:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:23,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495128659] [2023-12-02 17:37:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:37:23,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495128659] [2023-12-02 17:37:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495128659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:23,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:23,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:37:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296030727] [2023-12-02 17:37:23,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:23,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:37:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:37:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:23,321 INFO L87 Difference]: Start difference. First operand 7272 states and 11370 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:37:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:24,255 INFO L93 Difference]: Finished difference Result 19724 states and 31127 transitions. [2023-12-02 17:37:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:37:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2023-12-02 17:37:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:24,319 INFO L225 Difference]: With dead ends: 19724 [2023-12-02 17:37:24,319 INFO L226 Difference]: Without dead ends: 12475 [2023-12-02 17:37:24,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:24,339 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 494 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:24,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1051 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:37:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12475 states. [2023-12-02 17:37:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12475 to 12383. [2023-12-02 17:37:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12383 states, 8765 states have (on average 1.5264118653736451) internal successors, (13379), 9312 states have internal predecessors, (13379), 2701 states have call successors, (2701), 713 states have call predecessors, (2701), 916 states have return successors, (3399), 2539 states have call predecessors, (3399), 2696 states have call successors, (3399) [2023-12-02 17:37:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12383 states to 12383 states and 19479 transitions. [2023-12-02 17:37:25,132 INFO L78 Accepts]: Start accepts. Automaton has 12383 states and 19479 transitions. Word has length 95 [2023-12-02 17:37:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:25,132 INFO L495 AbstractCegarLoop]: Abstraction has 12383 states and 19479 transitions. [2023-12-02 17:37:25,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:37:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 12383 states and 19479 transitions. [2023-12-02 17:37:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 17:37:25,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:25,135 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 17:37:25,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:37:25,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:25,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash -530388821, now seen corresponding path program 1 times [2023-12-02 17:37:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:25,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658563380] [2023-12-02 17:37:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:37:25,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:25,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658563380] [2023-12-02 17:37:25,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658563380] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:25,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:25,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:37:25,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052952782] [2023-12-02 17:37:25,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:25,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:37:25,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:37:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:25,233 INFO L87 Difference]: Start difference. First operand 12383 states and 19479 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 17:37:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:26,660 INFO L93 Difference]: Finished difference Result 35053 states and 55941 transitions. [2023-12-02 17:37:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:37:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2023-12-02 17:37:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:26,780 INFO L225 Difference]: With dead ends: 35053 [2023-12-02 17:37:26,780 INFO L226 Difference]: Without dead ends: 22699 [2023-12-02 17:37:26,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:26,824 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 493 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:26,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1058 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:37:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22699 states. [2023-12-02 17:37:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22699 to 22606. [2023-12-02 17:37:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22606 states, 16024 states have (on average 1.5230279580629056) internal successors, (24405), 17043 states have internal predecessors, (24405), 4913 states have call successors, (4913), 1289 states have call predecessors, (4913), 1668 states have return successors, (6649), 4595 states have call predecessors, (6649), 4908 states have call successors, (6649) [2023-12-02 17:37:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22606 states to 22606 states and 35967 transitions. [2023-12-02 17:37:28,273 INFO L78 Accepts]: Start accepts. Automaton has 22606 states and 35967 transitions. Word has length 93 [2023-12-02 17:37:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:28,274 INFO L495 AbstractCegarLoop]: Abstraction has 22606 states and 35967 transitions. [2023-12-02 17:37:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 17:37:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 22606 states and 35967 transitions. [2023-12-02 17:37:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 17:37:28,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:28,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:28,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 17:37:28,277 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:28,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 911132123, now seen corresponding path program 1 times [2023-12-02 17:37:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:28,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340527554] [2023-12-02 17:37:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:28,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:37:28,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:28,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340527554] [2023-12-02 17:37:28,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340527554] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:28,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:28,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:37:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936154186] [2023-12-02 17:37:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:28,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:37:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:37:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:28,383 INFO L87 Difference]: Start difference. First operand 22606 states and 35967 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:37:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:31,030 INFO L93 Difference]: Finished difference Result 65712 states and 106988 transitions. [2023-12-02 17:37:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:37:31,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2023-12-02 17:37:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:31,267 INFO L225 Difference]: With dead ends: 65712 [2023-12-02 17:37:31,267 INFO L226 Difference]: Without dead ends: 43147 [2023-12-02 17:37:31,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:37:31,356 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 492 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:31,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1064 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:37:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43147 states. [2023-12-02 17:37:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43147 to 43053. [2023-12-02 17:37:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43053 states, 30543 states have (on average 1.5190059915528926) internal successors, (46395), 32506 states have internal predecessors, (46395), 9337 states have call successors, (9337), 2441 states have call predecessors, (9337), 3172 states have return successors, (14175), 8707 states have call predecessors, (14175), 9332 states have call successors, (14175) [2023-12-02 17:37:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43053 states to 43053 states and 69907 transitions. [2023-12-02 17:37:34,043 INFO L78 Accepts]: Start accepts. Automaton has 43053 states and 69907 transitions. Word has length 97 [2023-12-02 17:37:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:34,044 INFO L495 AbstractCegarLoop]: Abstraction has 43053 states and 69907 transitions. [2023-12-02 17:37:34,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:37:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 43053 states and 69907 transitions. [2023-12-02 17:37:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 17:37:34,047 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:34,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:34,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 17:37:34,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:34,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1819788984, now seen corresponding path program 1 times [2023-12-02 17:37:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:34,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65808937] [2023-12-02 17:37:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:37:34,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65808937] [2023-12-02 17:37:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65808937] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:34,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:34,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-02 17:37:34,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240412997] [2023-12-02 17:37:34,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:34,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 17:37:34,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 17:37:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:37:34,938 INFO L87 Difference]: Start difference. First operand 43053 states and 69907 transitions. Second operand has 14 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 7 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2023-12-02 17:37:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:42,316 INFO L93 Difference]: Finished difference Result 51890 states and 87155 transitions. [2023-12-02 17:37:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:37:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 7 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) Word has length 98 [2023-12-02 17:37:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:42,534 INFO L225 Difference]: With dead ends: 51890 [2023-12-02 17:37:42,534 INFO L226 Difference]: Without dead ends: 49884 [2023-12-02 17:37:42,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:37:42,564 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 3214 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 4805 mSolverCounterSat, 1188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3261 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 5993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1188 IncrementalHoareTripleChecker+Valid, 4805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:42,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3261 Valid, 2757 Invalid, 5993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1188 Valid, 4805 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 17:37:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49884 states. [2023-12-02 17:37:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49884 to 47581. [2023-12-02 17:37:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47581 states, 33951 states have (on average 1.5189537863391358) internal successors, (51570), 36050 states have internal predecessors, (51570), 9998 states have call successors, (9998), 2781 states have call predecessors, (9998), 3631 states have return successors, (15431), 9351 states have call predecessors, (15431), 9993 states have call successors, (15431) [2023-12-02 17:37:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47581 states to 47581 states and 76999 transitions. [2023-12-02 17:37:46,263 INFO L78 Accepts]: Start accepts. Automaton has 47581 states and 76999 transitions. Word has length 98 [2023-12-02 17:37:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:46,264 INFO L495 AbstractCegarLoop]: Abstraction has 47581 states and 76999 transitions. [2023-12-02 17:37:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 7 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2023-12-02 17:37:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 47581 states and 76999 transitions. [2023-12-02 17:37:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-02 17:37:46,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:46,266 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:46,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:37:46,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:46,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:46,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1662198755, now seen corresponding path program 1 times [2023-12-02 17:37:46,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:46,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635094841] [2023-12-02 17:37:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:46,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:37:46,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635094841] [2023-12-02 17:37:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635094841] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:37:46,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:37:46,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:37:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784145515] [2023-12-02 17:37:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:37:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:37:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:37:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:37:46,440 INFO L87 Difference]: Start difference. First operand 47581 states and 76999 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 17:37:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:55,399 INFO L93 Difference]: Finished difference Result 150205 states and 247401 transitions. [2023-12-02 17:37:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:37:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2023-12-02 17:37:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:55,860 INFO L225 Difference]: With dead ends: 150205 [2023-12-02 17:37:55,860 INFO L226 Difference]: Without dead ends: 102701 [2023-12-02 17:37:55,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:37:55,998 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1194 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:55,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1247 Valid, 903 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 17:37:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102701 states. [2023-12-02 17:38:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102701 to 98971. [2023-12-02 17:38:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98971 states, 71160 states have (on average 1.518788645306352) internal successors, (108077), 75375 states have internal predecessors, (108077), 20286 states have call successors, (20286), 5821 states have call predecessors, (20286), 7524 states have return successors, (32545), 18936 states have call predecessors, (32545), 20281 states have call successors, (32545) [2023-12-02 17:38:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98971 states to 98971 states and 160908 transitions. [2023-12-02 17:38:03,974 INFO L78 Accepts]: Start accepts. Automaton has 98971 states and 160908 transitions. Word has length 96 [2023-12-02 17:38:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:38:03,975 INFO L495 AbstractCegarLoop]: Abstraction has 98971 states and 160908 transitions. [2023-12-02 17:38:03,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 17:38:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 98971 states and 160908 transitions. [2023-12-02 17:38:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 17:38:03,978 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:38:03,978 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:38:03,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 17:38:03,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:38:03,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:38:03,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1312364652, now seen corresponding path program 1 times [2023-12-02 17:38:03,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:38:03,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347412673] [2023-12-02 17:38:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:03,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:38:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:38:04,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:38:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347412673] [2023-12-02 17:38:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347412673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:38:04,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:38:04,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:38:04,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338756557] [2023-12-02 17:38:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:38:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:38:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:38:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:38:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:38:04,097 INFO L87 Difference]: Start difference. First operand 98971 states and 160908 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:38:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:38:10,708 INFO L93 Difference]: Finished difference Result 105132 states and 171866 transitions. [2023-12-02 17:38:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:38:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 101 [2023-12-02 17:38:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:38:11,208 INFO L225 Difference]: With dead ends: 105132 [2023-12-02 17:38:11,208 INFO L226 Difference]: Without dead ends: 105121 [2023-12-02 17:38:11,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:38:11,259 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 474 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:38:11,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1064 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:38:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105121 states. [2023-12-02 17:38:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105121 to 104288. [2023-12-02 17:38:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104288 states, 74934 states have (on average 1.5165745856353592) internal successors, (113643), 79410 states have internal predecessors, (113643), 21404 states have call successors, (21404), 6143 states have call predecessors, (21404), 7949 states have return successors, (35365), 19966 states have call predecessors, (35365), 21399 states have call successors, (35365) [2023-12-02 17:38:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104288 states to 104288 states and 170412 transitions. [2023-12-02 17:38:19,863 INFO L78 Accepts]: Start accepts. Automaton has 104288 states and 170412 transitions. Word has length 101 [2023-12-02 17:38:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:38:19,864 INFO L495 AbstractCegarLoop]: Abstraction has 104288 states and 170412 transitions. [2023-12-02 17:38:19,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:38:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 104288 states and 170412 transitions. [2023-12-02 17:38:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 17:38:19,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:38:19,876 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:38:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 17:38:19,877 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:38:19,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:38:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash 493056787, now seen corresponding path program 1 times [2023-12-02 17:38:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:38:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206222022] [2023-12-02 17:38:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:38:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 17:38:20,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:38:20,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206222022] [2023-12-02 17:38:20,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206222022] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:38:20,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823145285] [2023-12-02 17:38:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:20,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:38:20,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:38:20,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:38:20,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:38:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:20,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:38:20,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:38:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:38:21,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:38:21,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823145285] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:38:21,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:38:21,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-12-02 17:38:21,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552821846] [2023-12-02 17:38:21,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:38:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:38:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:38:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:38:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:38:21,094 INFO L87 Difference]: Start difference. First operand 104288 states and 170412 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:38:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:38:29,457 INFO L93 Difference]: Finished difference Result 215326 states and 361472 transitions. [2023-12-02 17:38:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:38:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 146 [2023-12-02 17:38:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:38:30,097 INFO L225 Difference]: With dead ends: 215326 [2023-12-02 17:38:30,097 INFO L226 Difference]: Without dead ends: 111113 [2023-12-02 17:38:30,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:38:30,454 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 213 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:38:30,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1287 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:38:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111113 states. [2023-12-02 17:38:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111113 to 111113. [2023-12-02 17:38:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111113 states, 81584 states have (on average 1.5495440282408315) internal successors, (126418), 86060 states have internal predecessors, (126418), 21404 states have call successors, (21404), 6318 states have call predecessors, (21404), 8124 states have return successors, (35365), 19966 states have call predecessors, (35365), 21399 states have call successors, (35365) [2023-12-02 17:38:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111113 states to 111113 states and 183187 transitions. [2023-12-02 17:38:38,829 INFO L78 Accepts]: Start accepts. Automaton has 111113 states and 183187 transitions. Word has length 146 [2023-12-02 17:38:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:38:38,829 INFO L495 AbstractCegarLoop]: Abstraction has 111113 states and 183187 transitions. [2023-12-02 17:38:38,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:38:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 111113 states and 183187 transitions. [2023-12-02 17:38:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 17:38:38,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:38:38,838 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:38:38,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:38:39,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:38:39,039 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:38:39,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:38:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1473746867, now seen corresponding path program 1 times [2023-12-02 17:38:39,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:38:39,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653083054] [2023-12-02 17:38:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:38:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-02 17:38:39,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:38:39,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653083054] [2023-12-02 17:38:39,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653083054] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:38:39,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894995025] [2023-12-02 17:38:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:39,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:38:39,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:38:39,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:38:39,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:38:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:39,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:38:39,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:38:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 17:38:39,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:38:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894995025] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:38:39,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:38:39,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 17:38:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909105126] [2023-12-02 17:38:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:38:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:38:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:38:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:38:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:38:39,797 INFO L87 Difference]: Start difference. First operand 111113 states and 183187 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:38:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:38:48,022 INFO L93 Difference]: Finished difference Result 228976 states and 386539 transitions. [2023-12-02 17:38:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:38:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 151 [2023-12-02 17:38:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:38:48,695 INFO L225 Difference]: With dead ends: 228976 [2023-12-02 17:38:48,695 INFO L226 Difference]: Without dead ends: 117938 [2023-12-02 17:38:48,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:38:48,954 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 211 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:38:48,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1287 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:38:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117938 states. [2023-12-02 17:38:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117938 to 117938. [2023-12-02 17:38:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117938 states, 88234 states have (on average 1.5775438039757916) internal successors, (139193), 92710 states have internal predecessors, (139193), 21404 states have call successors, (21404), 6493 states have call predecessors, (21404), 8299 states have return successors, (35365), 19966 states have call predecessors, (35365), 21399 states have call successors, (35365) [2023-12-02 17:38:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117938 states to 117938 states and 195962 transitions. [2023-12-02 17:38:57,796 INFO L78 Accepts]: Start accepts. Automaton has 117938 states and 195962 transitions. Word has length 151 [2023-12-02 17:38:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:38:57,797 INFO L495 AbstractCegarLoop]: Abstraction has 117938 states and 195962 transitions. [2023-12-02 17:38:57,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:38:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 117938 states and 195962 transitions. [2023-12-02 17:38:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-02 17:38:57,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:38:57,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:38:57,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:38:58,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:38:58,006 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:38:58,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:38:58,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1211157347, now seen corresponding path program 1 times [2023-12-02 17:38:58,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:38:58,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429604600] [2023-12-02 17:38:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:58,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:38:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-02 17:38:58,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:38:58,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429604600] [2023-12-02 17:38:58,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429604600] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:38:58,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613408534] [2023-12-02 17:38:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:58,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:38:58,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:38:58,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:38:58,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:38:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:58,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:38:58,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:38:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:38:58,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:38:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613408534] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:38:58,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:38:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 17:38:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676105920] [2023-12-02 17:38:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:38:58,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:38:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:38:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:38:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:38:58,541 INFO L87 Difference]: Start difference. First operand 117938 states and 195962 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:39:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:39:07,214 INFO L93 Difference]: Finished difference Result 242626 states and 411606 transitions. [2023-12-02 17:39:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:39:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 155 [2023-12-02 17:39:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:39:07,926 INFO L225 Difference]: With dead ends: 242626 [2023-12-02 17:39:07,926 INFO L226 Difference]: Without dead ends: 124763 [2023-12-02 17:39:08,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:39:08,197 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 209 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:39:08,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1287 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:39:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124763 states. [2023-12-02 17:39:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124763 to 124763. [2023-12-02 17:39:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124763 states, 94884 states have (on average 1.6016188187681801) internal successors, (151968), 99360 states have internal predecessors, (151968), 21404 states have call successors, (21404), 6668 states have call predecessors, (21404), 8474 states have return successors, (35365), 19966 states have call predecessors, (35365), 21399 states have call successors, (35365) [2023-12-02 17:39:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124763 states to 124763 states and 208737 transitions. [2023-12-02 17:39:17,777 INFO L78 Accepts]: Start accepts. Automaton has 124763 states and 208737 transitions. Word has length 155 [2023-12-02 17:39:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:39:17,778 INFO L495 AbstractCegarLoop]: Abstraction has 124763 states and 208737 transitions. [2023-12-02 17:39:17,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:39:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 124763 states and 208737 transitions. [2023-12-02 17:39:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 17:39:17,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:39:17,787 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:39:17,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:39:17,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:39:17,988 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:39:17,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:39:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1792402445, now seen corresponding path program 1 times [2023-12-02 17:39:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:39:17,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317558479] [2023-12-02 17:39:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:39:17,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:39:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:39:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 17:39:19,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:39:19,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317558479] [2023-12-02 17:39:19,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317558479] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:39:19,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73773994] [2023-12-02 17:39:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:39:19,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:39:19,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:39:19,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:39:19,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:39:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:39:19,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:39:19,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:39:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:39:19,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:39:19,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73773994] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:39:19,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:39:19,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-12-02 17:39:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145148422] [2023-12-02 17:39:19,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:39:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:39:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:39:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:39:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:39:19,692 INFO L87 Difference]: Start difference. First operand 124763 states and 208737 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:39:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:39:27,810 INFO L93 Difference]: Finished difference Result 256276 states and 436673 transitions. [2023-12-02 17:39:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:39:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 158 [2023-12-02 17:39:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:39:28,526 INFO L225 Difference]: With dead ends: 256276 [2023-12-02 17:39:28,527 INFO L226 Difference]: Without dead ends: 131588 [2023-12-02 17:39:28,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:39:28,790 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 207 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:39:28,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1287 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:39:28,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131588 states. [2023-12-02 17:39:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131588 to 131588. [2023-12-02 17:39:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131588 states, 101534 states have (on average 1.6225402328284122) internal successors, (164743), 106010 states have internal predecessors, (164743), 21404 states have call successors, (21404), 6843 states have call predecessors, (21404), 8649 states have return successors, (35365), 19966 states have call predecessors, (35365), 21399 states have call successors, (35365) [2023-12-02 17:39:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131588 states to 131588 states and 221512 transitions. [2023-12-02 17:39:38,429 INFO L78 Accepts]: Start accepts. Automaton has 131588 states and 221512 transitions. Word has length 158 [2023-12-02 17:39:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:39:38,429 INFO L495 AbstractCegarLoop]: Abstraction has 131588 states and 221512 transitions. [2023-12-02 17:39:38,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 17:39:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 131588 states and 221512 transitions. [2023-12-02 17:39:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 17:39:38,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:39:38,443 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:38,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 17:39:38,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 17:39:38,644 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:39:38,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:39:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2090308933, now seen corresponding path program 1 times [2023-12-02 17:39:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:39:38,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141133565] [2023-12-02 17:39:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:39:38,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:39:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:39:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 17:39:39,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:39:39,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141133565] [2023-12-02 17:39:39,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141133565] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:39:39,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563525868] [2023-12-02 17:39:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:39:39,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:39:39,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:39:39,882 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:39:39,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:39:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:39:40,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:39:40,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:39:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-02 17:39:40,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:39:40,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563525868] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:39:40,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:39:40,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22] total 26 [2023-12-02 17:39:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933438787] [2023-12-02 17:39:40,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:39:40,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:39:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:39:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:39:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:39:40,446 INFO L87 Difference]: Start difference. First operand 131588 states and 221512 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-12-02 17:39:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:39:49,010 INFO L93 Difference]: Finished difference Result 263168 states and 443539 transitions. [2023-12-02 17:39:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:39:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 160 [2023-12-02 17:39:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:39:49,586 INFO L225 Difference]: With dead ends: 263168 [2023-12-02 17:39:49,586 INFO L226 Difference]: Without dead ends: 131701 [2023-12-02 17:39:49,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:39:49,949 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 297 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:39:49,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 2143 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:39:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131701 states. [2023-12-02 17:39:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131701 to 131588. [2023-12-02 17:39:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131588 states, 101534 states have (on average 1.6195954064648295) internal successors, (164444), 106010 states have internal predecessors, (164444), 21404 states have call successors, (21404), 6843 states have call predecessors, (21404), 8649 states have return successors, (35365), 19966 states have call predecessors, (35365), 21399 states have call successors, (35365) [2023-12-02 17:39:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131588 states to 131588 states and 221213 transitions. [2023-12-02 17:39:59,209 INFO L78 Accepts]: Start accepts. Automaton has 131588 states and 221213 transitions. Word has length 160 [2023-12-02 17:39:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:39:59,210 INFO L495 AbstractCegarLoop]: Abstraction has 131588 states and 221213 transitions. [2023-12-02 17:39:59,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-12-02 17:39:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 131588 states and 221213 transitions. [2023-12-02 17:39:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-02 17:39:59,219 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:39:59,220 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:59,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:39:59,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 17:39:59,420 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:39:59,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:39:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash 556469789, now seen corresponding path program 1 times [2023-12-02 17:39:59,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:39:59,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262553447] [2023-12-02 17:39:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:39:59,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:39:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 17:40:00,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262553447] [2023-12-02 17:40:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262553447] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:40:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686618922] [2023-12-02 17:40:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:00,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:40:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:40:00,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:40:00,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:40:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:00,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:40:00,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:40:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 17:40:00,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:40:00,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686618922] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:40:00,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:40:00,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-12-02 17:40:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396514272] [2023-12-02 17:40:00,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:40:00,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:40:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:40:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:40:00,816 INFO L87 Difference]: Start difference. First operand 131588 states and 221213 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2023-12-02 17:40:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:40:08,238 INFO L93 Difference]: Finished difference Result 133590 states and 228781 transitions. [2023-12-02 17:40:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:40:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 163 [2023-12-02 17:40:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:40:08,886 INFO L225 Difference]: With dead ends: 133590 [2023-12-02 17:40:08,886 INFO L226 Difference]: Without dead ends: 133504 [2023-12-02 17:40:08,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:40:08,931 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 47 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:40:08,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1563 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:40:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133504 states. [2023-12-02 17:40:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133504 to 131780. [2023-12-02 17:40:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131780 states, 101726 states have (on average 1.6174822562570041) internal successors, (164540), 106202 states have internal predecessors, (164540), 21404 states have call successors, (21404), 6843 states have call predecessors, (21404), 8649 states have return successors, (35365), 19966 states have call predecessors, (35365), 21399 states have call successors, (35365) [2023-12-02 17:40:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131780 states to 131780 states and 221309 transitions. [2023-12-02 17:40:18,414 INFO L78 Accepts]: Start accepts. Automaton has 131780 states and 221309 transitions. Word has length 163 [2023-12-02 17:40:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:40:18,414 INFO L495 AbstractCegarLoop]: Abstraction has 131780 states and 221309 transitions. [2023-12-02 17:40:18,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2023-12-02 17:40:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 131780 states and 221309 transitions. [2023-12-02 17:40:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-12-02 17:40:18,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:40:18,425 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:40:18,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 17:40:18,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 17:40:18,626 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:40:18,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:40:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1209306811, now seen corresponding path program 1 times [2023-12-02 17:40:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:40:18,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340285351] [2023-12-02 17:40:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:40:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-02 17:40:18,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:40:18,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340285351] [2023-12-02 17:40:18,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340285351] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:40:18,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169661979] [2023-12-02 17:40:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:40:18,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:40:18,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:40:18,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:40:18,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:40:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:40:19,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:40:19,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:40:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-12-02 17:40:19,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:40:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-12-02 17:40:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169661979] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:40:20,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692770424] [2023-12-02 17:40:20,369 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2023-12-02 17:40:20,370 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:40:20,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:40:20,380 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:40:20,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:41:00,454 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 435 for LOIs [2023-12-02 17:41:01,443 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 592 for LOIs [2023-12-02 17:44:25,086 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 629 for LOIs [2023-12-02 17:44:35,212 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 635 for LOIs [2023-12-02 17:44:37,301 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 583 for LOIs [2023-12-02 17:44:49,950 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 587 for LOIs [2023-12-02 17:44:53,578 INFO L197 IcfgInterpreter]: Interpreting procedure isEmpty with input of size 25 for LOIs [2023-12-02 17:44:53,629 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 15 for LOIs [2023-12-02 17:44:53,631 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 515 for LOIs [2023-12-02 17:44:54,392 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__empty with input of size 193 for LOIs [2023-12-02 17:45:03,056 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 44 for LOIs [2023-12-02 17:45:03,093 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 134 for LOIs [2023-12-02 17:45:04,414 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 195 for LOIs [2023-12-02 17:45:07,335 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 181 for LOIs [2023-12-02 17:45:07,728 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 132 for LOIs [2023-12-02 17:45:07,845 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 157 for LOIs [2023-12-02 17:45:07,985 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 239 for LOIs [2023-12-02 17:45:10,340 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 19 for LOIs [2023-12-02 17:45:10,363 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:45:37,098 WARN L293 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 585 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:46:19,315 WARN L293 SmtUtils]: Spent 14.91s on a formula simplification. DAG size of input: 629 DAG size of output: 623 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:46:56,425 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 516 DAG size of output: 514 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:47:37,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3659867#(and (<= 1 |#StackHeapBarrier|) (= ~head~0.offset 0) (or (and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 37) 9) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (exists ((|v_cleanup_anyStopRequested_#res#1_BEFORE_RETURN_1| Int) (|v_cleanup_~i~1#1_BEFORE_RETURN_1| Int) (|v_cleanup_isIdle_#res#1_BEFORE_RETURN_1| Int) (|v_cleanup_~tmp~23#1_BEFORE_RETURN_1| Int)) (and (<= 0 |v_cleanup_~i~1#1_BEFORE_RETURN_1|) (or (and (= |v_cleanup_isIdle_#res#1_BEFORE_RETURN_1| 0) (= |v_cleanup_~tmp~23#1_BEFORE_RETURN_1| 0) (= |v_cleanup_anyStopRequested_#res#1_BEFORE_RETURN_1| 1)) (= |v_cleanup_~i~1#1_BEFORE_RETURN_1| 0)))) (= (select (select |#memory_int| 35) 2) 105) (= 32 (select (select |#memory_int| 32) 0))) (and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 37) 9) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (exists ((|v_cleanup_~tmp~23#1_BEFORE_RETURN_2| Int) (|v_cleanup_isIdle_#res#1_BEFORE_RETURN_2| Int) (|v_cleanup_~i~1#1_BEFORE_RETURN_2| Int) (|v_cleanup_anyStopRequested_#res#1_BEFORE_RETURN_2| Int)) (and (or (= |v_cleanup_~i~1#1_BEFORE_RETURN_2| 0) (and (= |v_cleanup_anyStopRequested_#res#1_BEFORE_RETURN_2| 1) (= |v_cleanup_~tmp~23#1_BEFORE_RETURN_2| 0) (= |v_cleanup_isIdle_#res#1_BEFORE_RETURN_2| 0))) (<= 0 |v_cleanup_~i~1#1_BEFORE_RETURN_2|))) (= (select (select |#memory_int| 36) 0) 10) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (= (select (select |#memory_int| 35) 2) 105) (= 32 (select (select |#memory_int| 32) 0)))) (not (= 0 ~floorButtons_spc9_1~0)) (= 0 ~floorButtons_spc9_0~0) (= ~head~0.base 0) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12))' at error location [2023-12-02 17:47:37,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:37,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2023-12-02 17:47:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847896686] [2023-12-02 17:47:37,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:37,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:47:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:47:37,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=13719, Unknown=0, NotChecked=0, Total=14762 [2023-12-02 17:47:37,777 INFO L87 Difference]: Start difference. First operand 131780 states and 221309 transitions. Second operand has 17 states, 17 states have (on average 13.823529411764707) internal successors, (235), 17 states have internal predecessors, (235), 10 states have call successors, (70), 4 states have call predecessors, (70), 6 states have return successors, (69), 10 states have call predecessors, (69), 9 states have call successors, (69) [2023-12-02 17:47:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:54,434 INFO L93 Difference]: Finished difference Result 315601 states and 587733 transitions. [2023-12-02 17:47:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:47:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 13.823529411764707) internal successors, (235), 17 states have internal predecessors, (235), 10 states have call successors, (70), 4 states have call predecessors, (70), 6 states have return successors, (69), 10 states have call predecessors, (69), 9 states have call successors, (69) Word has length 264 [2023-12-02 17:47:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:55,484 INFO L225 Difference]: With dead ends: 315601 [2023-12-02 17:47:55,484 INFO L226 Difference]: Without dead ends: 178191 [2023-12-02 17:47:56,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 692 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8734 ImplicationChecksByTransitivity, 148.7s TimeCoverageRelationStatistics Valid=1369, Invalid=20387, Unknown=0, NotChecked=0, Total=21756 [2023-12-02 17:47:56,361 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 2605 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 6542 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2612 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 7706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 6542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:56,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2612 Valid, 2945 Invalid, 7706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 6542 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-02 17:47:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178191 states. [2023-12-02 17:48:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178191 to 168293. [2023-12-02 17:48:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168293 states, 129790 states have (on average 1.584721473148933) internal successors, (205681), 136006 states have internal predecessors, (205681), 27677 states have call successors, (27677), 7907 states have call predecessors, (27677), 10825 states have return successors, (61095), 25647 states have call predecessors, (61095), 27672 states have call successors, (61095) [2023-12-02 17:48:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168293 states to 168293 states and 294453 transitions. [2023-12-02 17:48:10,201 INFO L78 Accepts]: Start accepts. Automaton has 168293 states and 294453 transitions. Word has length 264 [2023-12-02 17:48:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:48:10,201 INFO L495 AbstractCegarLoop]: Abstraction has 168293 states and 294453 transitions. [2023-12-02 17:48:10,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.823529411764707) internal successors, (235), 17 states have internal predecessors, (235), 10 states have call successors, (70), 4 states have call predecessors, (70), 6 states have return successors, (69), 10 states have call predecessors, (69), 9 states have call successors, (69) [2023-12-02 17:48:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 168293 states and 294453 transitions. [2023-12-02 17:48:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-12-02 17:48:10,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:48:10,227 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:10,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:48:10,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:48:10,428 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:48:10,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:48:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash -323380965, now seen corresponding path program 1 times [2023-12-02 17:48:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:48:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760625493] [2023-12-02 17:48:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:10,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:48:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-12-02 17:48:12,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:48:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760625493] [2023-12-02 17:48:12,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760625493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:48:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392221052] [2023-12-02 17:48:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:12,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:48:12,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:48:12,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:48:12,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b92a21f-0af8-4d47-88d7-fdff64c30ee0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:48:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:12,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:48:12,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:48:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 17:48:12,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:48:12,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392221052] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:48:12,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:48:12,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-12-02 17:48:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200131691] [2023-12-02 17:48:12,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:48:12,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:48:12,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:48:12,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:48:12,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:48:12,439 INFO L87 Difference]: Start difference. First operand 168293 states and 294453 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:48:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:48:24,999 INFO L93 Difference]: Finished difference Result 347289 states and 623892 transitions. [2023-12-02 17:48:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:48:25,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 186 [2023-12-02 17:48:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:48:26,067 INFO L225 Difference]: With dead ends: 347289 [2023-12-02 17:48:26,068 INFO L226 Difference]: Without dead ends: 179178 [2023-12-02 17:48:26,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:48:26,723 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 205 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:48:26,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1287 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]