./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2 --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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:23:25,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:23:25,474 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:23:25,480 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:23:25,483 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:23:25,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:23:25,520 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:23:25,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:23:25,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:23:25,525 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:23:25,525 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:23:25,526 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:23:25,527 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:23:25,528 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:23:25,528 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:23:25,528 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:23:25,529 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:23:25,531 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:23:25,533 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:23:25,534 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:23:25,534 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:23:25,538 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:23:25,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:23:25,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:23:25,539 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:23:25,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:23:25,540 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:23:25,540 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:23:25,540 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:23:25,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:23:25,541 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:23:25,541 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:23:25,541 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:23:25,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:23:25,542 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:23:25,543 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:23:25,544 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:23:25,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:23:25,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:23:25,553 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:23:25,554 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:23:25,554 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:23:25,554 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:23:25,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:23:25,555 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:23:25,556 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:23:25,556 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:23:25,556 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_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2024-11-02 12:23:25,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:23:25,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:23:25,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:23:25,941 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:23:25,942 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:23:25,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c Unable to find full path for "g++" [2024-11-02 12:23:28,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:23:28,534 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:23:28,535 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2024-11-02 12:23:28,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/data/c4c55843b/2a94c10599ad4a9893867686a49390c1/FLAG5c567cf5b [2024-11-02 12:23:28,587 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/data/c4c55843b/2a94c10599ad4a9893867686a49390c1 [2024-11-02 12:23:28,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:23:28,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:23:28,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:23:28,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:23:28,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:23:28,602 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:28" (1/1) ... [2024-11-02 12:23:28,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c69240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:28, skipping insertion in model container [2024-11-02 12:23:28,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:28" (1/1) ... [2024-11-02 12:23:28,692 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:23:28,975 WARN L251 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_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2024-11-02 12:23:29,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:23:29,484 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:23:29,495 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2024-11-02 12:23:29,497 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [57] [2024-11-02 12:23:29,498 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [423] [2024-11-02 12:23:29,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [523] [2024-11-02 12:23:29,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [643] [2024-11-02 12:23:29,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [832] [2024-11-02 12:23:29,499 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1185] [2024-11-02 12:23:29,500 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1200] [2024-11-02 12:23:29,500 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2726] [2024-11-02 12:23:29,500 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3387] [2024-11-02 12:23:29,505 WARN L251 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_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2024-11-02 12:23:29,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:23:29,742 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:23:29,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29 WrapperNode [2024-11-02 12:23:29,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:23:29,744 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:23:29,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:23:29,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:23:29,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,865 INFO L138 Inliner]: procedures = 91, calls = 344, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1100 [2024-11-02 12:23:29,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:23:29,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:23:29,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:23:29,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:23:29,885 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,940 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,984 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:29,992 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:30,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:23:30,014 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:23:30,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:23:30,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:23:30,019 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (1/1) ... [2024-11-02 12:23:30,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:23:30,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:30,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:23:30,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:23:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:23:30,110 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-02 12:23:30,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-02 12:23:30,111 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-02 12:23:30,111 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-02 12:23:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-02 12:23:30,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-02 12:23:30,112 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-02 12:23:30,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-02 12:23:30,113 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-02 12:23:30,113 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-02 12:23:30,114 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-02 12:23:30,115 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-02 12:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 12:23:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 12:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 12:23:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 12:23:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-02 12:23:30,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-02 12:23:30,119 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-02 12:23:30,119 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-02 12:23:30,119 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-02 12:23:30,119 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-02 12:23:30,119 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-02 12:23:30,120 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-02 12:23:30,120 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-02 12:23:30,120 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-02 12:23:30,120 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-02 12:23:30,121 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-02 12:23:30,121 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-02 12:23:30,121 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-02 12:23:30,121 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-02 12:23:30,121 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-02 12:23:30,122 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-02 12:23:30,122 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-02 12:23:30,122 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-02 12:23:30,122 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-02 12:23:30,122 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-02 12:23:30,122 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-02 12:23:30,122 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-02 12:23:30,123 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-02 12:23:30,123 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-02 12:23:30,123 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-02 12:23:30,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:23:30,123 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-02 12:23:30,123 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-02 12:23:30,123 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-02 12:23:30,124 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-02 12:23:30,124 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-02 12:23:30,126 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-02 12:23:30,126 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-02 12:23:30,126 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-02 12:23:30,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:23:30,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:23:30,127 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-02 12:23:30,127 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-02 12:23:30,336 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:23:30,340 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:23:31,993 INFO L? ?]: Removed 451 outVars from TransFormulas that were not future-live. [2024-11-02 12:23:31,993 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:23:32,968 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:23:32,972 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:23:32,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:23:32 BoogieIcfgContainer [2024-11-02 12:23:32,973 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:23:32,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:23:32,976 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:23:32,980 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:23:32,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:23:28" (1/3) ... [2024-11-02 12:23:32,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2827c815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:23:32, skipping insertion in model container [2024-11-02 12:23:32,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:29" (2/3) ... [2024-11-02 12:23:32,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2827c815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:23:32, skipping insertion in model container [2024-11-02 12:23:32,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:23:32" (3/3) ... [2024-11-02 12:23:32,984 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product11.cil.c [2024-11-02 12:23:33,011 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:23:33,011 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:23:33,122 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:23:33,131 INFO L333 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, 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;@6566b2fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:23:33,132 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:23:33,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2024-11-02 12:23:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-02 12:23:33,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:33,170 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:23:33,170 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:33,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1209484934, now seen corresponding path program 1 times [2024-11-02 12:23:33,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:33,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104399641] [2024-11-02 12:23:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:33,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:23:34,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:34,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104399641] [2024-11-02 12:23:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104399641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:34,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:34,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:23:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120458658] [2024-11-02 12:23:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:34,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:23:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:23:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:34,576 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-02 12:23:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:35,816 INFO L93 Difference]: Finished difference Result 1165 states and 1872 transitions. [2024-11-02 12:23:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:23:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2024-11-02 12:23:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:35,838 INFO L225 Difference]: With dead ends: 1165 [2024-11-02 12:23:35,839 INFO L226 Difference]: Without dead ends: 763 [2024-11-02 12:23:35,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:23:35,856 INFO L432 NwaCegarLoop]: 648 mSDtfsCounter, 586 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:35,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 2956 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 12:23:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2024-11-02 12:23:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 744. [2024-11-02 12:23:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 509 states have (on average 1.5658153241650294) internal successors, (797), 539 states have internal predecessors, (797), 190 states have call successors, (190), 47 states have call predecessors, (190), 44 states have return successors, (197), 177 states have call predecessors, (197), 186 states have call successors, (197) [2024-11-02 12:23:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1184 transitions. [2024-11-02 12:23:36,026 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1184 transitions. Word has length 87 [2024-11-02 12:23:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:36,028 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1184 transitions. [2024-11-02 12:23:36,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-02 12:23:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1184 transitions. [2024-11-02 12:23:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-02 12:23:36,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:36,035 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:23:36,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:23:36,035 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:36,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1044215575, now seen corresponding path program 1 times [2024-11-02 12:23:36,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:36,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708811017] [2024-11-02 12:23:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:23:36,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:36,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708811017] [2024-11-02 12:23:36,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708811017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:36,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057885274] [2024-11-02 12:23:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:36,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:36,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:36,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:36,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:23:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:37,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:37,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:23:37,235 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:37,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057885274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:37,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:37,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420024207] [2024-11-02 12:23:37,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:37,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:37,239 INFO L87 Difference]: Start difference. First operand 744 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-02 12:23:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:37,516 INFO L93 Difference]: Finished difference Result 2108 states and 3421 transitions. [2024-11-02 12:23:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:37,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2024-11-02 12:23:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:37,529 INFO L225 Difference]: With dead ends: 2108 [2024-11-02 12:23:37,530 INFO L226 Difference]: Without dead ends: 1376 [2024-11-02 12:23:37,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:37,537 INFO L432 NwaCegarLoop]: 1016 mSDtfsCounter, 556 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:37,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1518 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2024-11-02 12:23:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1343. [2024-11-02 12:23:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 926 states have (on average 1.5755939524838012) internal successors, (1459), 985 states have internal predecessors, (1459), 333 states have call successors, (333), 84 states have call predecessors, (333), 83 states have return successors, (360), 313 states have call predecessors, (360), 329 states have call successors, (360) [2024-11-02 12:23:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2152 transitions. [2024-11-02 12:23:37,669 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2152 transitions. Word has length 86 [2024-11-02 12:23:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:37,672 INFO L471 AbstractCegarLoop]: Abstraction has 1343 states and 2152 transitions. [2024-11-02 12:23:37,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-02 12:23:37,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2152 transitions. [2024-11-02 12:23:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-02 12:23:37,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:37,680 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:23:37,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:23:37,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:37,881 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:37,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1197743293, now seen corresponding path program 1 times [2024-11-02 12:23:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:37,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600363523] [2024-11-02 12:23:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:23:38,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:38,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600363523] [2024-11-02 12:23:38,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600363523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:38,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591343221] [2024-11-02 12:23:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:38,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:38,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:38,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:23:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:38,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:38,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:23:38,827 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:38,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591343221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:38,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:38,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:38,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243057323] [2024-11-02 12:23:38,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:38,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:38,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:38,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:38,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:38,830 INFO L87 Difference]: Start difference. First operand 1343 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-02 12:23:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:39,077 INFO L93 Difference]: Finished difference Result 2704 states and 4377 transitions. [2024-11-02 12:23:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:39,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2024-11-02 12:23:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:39,088 INFO L225 Difference]: With dead ends: 2704 [2024-11-02 12:23:39,089 INFO L226 Difference]: Without dead ends: 1373 [2024-11-02 12:23:39,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:39,103 INFO L432 NwaCegarLoop]: 598 mSDtfsCounter, 17 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:39,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1160 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:23:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-11-02 12:23:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1371. [2024-11-02 12:23:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 950 states have (on average 1.565263157894737) internal successors, (1487), 1009 states have internal predecessors, (1487), 337 states have call successors, (337), 84 states have call predecessors, (337), 83 states have return successors, (364), 317 states have call predecessors, (364), 333 states have call successors, (364) [2024-11-02 12:23:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2188 transitions. [2024-11-02 12:23:39,195 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2188 transitions. Word has length 88 [2024-11-02 12:23:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:39,196 INFO L471 AbstractCegarLoop]: Abstraction has 1371 states and 2188 transitions. [2024-11-02 12:23:39,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-02 12:23:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2188 transitions. [2024-11-02 12:23:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-02 12:23:39,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:39,199 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:23:39,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:23:39,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:39,400 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:39,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 909059588, now seen corresponding path program 1 times [2024-11-02 12:23:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:39,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990866106] [2024-11-02 12:23:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:39,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:23:39,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990866106] [2024-11-02 12:23:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990866106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97024572] [2024-11-02 12:23:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:39,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:39,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:39,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:23:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:40,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:40,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:23:40,481 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:40,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97024572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:40,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:40,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282543374] [2024-11-02 12:23:40,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:40,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:40,484 INFO L87 Difference]: Start difference. First operand 1371 states and 2188 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-02 12:23:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:40,884 INFO L93 Difference]: Finished difference Result 3362 states and 5441 transitions. [2024-11-02 12:23:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:40,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2024-11-02 12:23:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:40,914 INFO L225 Difference]: With dead ends: 3362 [2024-11-02 12:23:40,914 INFO L226 Difference]: Without dead ends: 2003 [2024-11-02 12:23:40,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:40,933 INFO L432 NwaCegarLoop]: 1058 mSDtfsCounter, 557 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:40,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1559 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2024-11-02 12:23:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1958. [2024-11-02 12:23:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1361 states have (on average 1.5716385011021308) internal successors, (2139), 1449 states have internal predecessors, (2139), 477 states have call successors, (477), 118 states have call predecessors, (477), 119 states have return successors, (524), 450 states have call predecessors, (524), 473 states have call successors, (524) [2024-11-02 12:23:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 3140 transitions. [2024-11-02 12:23:41,095 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 3140 transitions. Word has length 87 [2024-11-02 12:23:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:41,098 INFO L471 AbstractCegarLoop]: Abstraction has 1958 states and 3140 transitions. [2024-11-02 12:23:41,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-02 12:23:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 3140 transitions. [2024-11-02 12:23:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-02 12:23:41,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:41,106 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:23:41,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:23:41,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:41,307 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:41,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2030264545, now seen corresponding path program 1 times [2024-11-02 12:23:41,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:41,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32282666] [2024-11-02 12:23:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:41,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:23:41,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32282666] [2024-11-02 12:23:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32282666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193812125] [2024-11-02 12:23:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:41,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:41,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:41,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:41,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:23:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:42,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:23:42,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:23:42,423 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:42,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193812125] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:42,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:42,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:42,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470583065] [2024-11-02 12:23:42,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:42,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:42,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:42,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:42,425 INFO L87 Difference]: Start difference. First operand 1958 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-02 12:23:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:42,909 INFO L93 Difference]: Finished difference Result 5614 states and 9107 transitions. [2024-11-02 12:23:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:42,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2024-11-02 12:23:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:42,994 INFO L225 Difference]: With dead ends: 5614 [2024-11-02 12:23:42,997 INFO L226 Difference]: Without dead ends: 3669 [2024-11-02 12:23:43,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:43,014 INFO L432 NwaCegarLoop]: 627 mSDtfsCounter, 493 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:43,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1140 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:23:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2024-11-02 12:23:43,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3641. [2024-11-02 12:23:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 2511 states have (on average 1.5205097570688968) internal successors, (3818), 2685 states have internal predecessors, (3818), 902 states have call successors, (902), 230 states have call predecessors, (902), 227 states have return successors, (1033), 839 states have call predecessors, (1033), 896 states have call successors, (1033) [2024-11-02 12:23:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5753 transitions. [2024-11-02 12:23:43,255 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5753 transitions. Word has length 88 [2024-11-02 12:23:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:43,256 INFO L471 AbstractCegarLoop]: Abstraction has 3641 states and 5753 transitions. [2024-11-02 12:23:43,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-02 12:23:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5753 transitions. [2024-11-02 12:23:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-02 12:23:43,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:43,259 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:43,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:23:43,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:43,463 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:43,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1210101479, now seen corresponding path program 1 times [2024-11-02 12:23:43,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:43,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522826690] [2024-11-02 12:23:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:43,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 12:23:43,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522826690] [2024-11-02 12:23:43,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522826690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345678735] [2024-11-02 12:23:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:43,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:43,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:43,802 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:43,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:23:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:44,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 1552 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:23:44,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:23:44,347 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345678735] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:44,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:44,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-02 12:23:44,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26218112] [2024-11-02 12:23:44,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:44,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:23:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:23:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:23:44,349 INFO L87 Difference]: Start difference. First operand 3641 states and 5753 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-02 12:23:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:45,748 INFO L93 Difference]: Finished difference Result 6882 states and 10919 transitions. [2024-11-02 12:23:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:23:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2024-11-02 12:23:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:45,785 INFO L225 Difference]: With dead ends: 6882 [2024-11-02 12:23:45,786 INFO L226 Difference]: Without dead ends: 3253 [2024-11-02 12:23:45,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:23:45,830 INFO L432 NwaCegarLoop]: 604 mSDtfsCounter, 506 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:45,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 2557 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 12:23:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2024-11-02 12:23:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 3232. [2024-11-02 12:23:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3232 states, 2238 states have (on average 1.513851653261841) internal successors, (3388), 2387 states have internal predecessors, (3388), 788 states have call successors, (788), 210 states have call predecessors, (788), 205 states have return successors, (891), 730 states have call predecessors, (891), 782 states have call successors, (891) [2024-11-02 12:23:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3232 states to 3232 states and 5067 transitions. [2024-11-02 12:23:46,132 INFO L78 Accepts]: Start accepts. Automaton has 3232 states and 5067 transitions. Word has length 89 [2024-11-02 12:23:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:46,133 INFO L471 AbstractCegarLoop]: Abstraction has 3232 states and 5067 transitions. [2024-11-02 12:23:46,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-02 12:23:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3232 states and 5067 transitions. [2024-11-02 12:23:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-02 12:23:46,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:46,136 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:46,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-02 12:23:46,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-02 12:23:46,340 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:46,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1714611040, now seen corresponding path program 1 times [2024-11-02 12:23:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765648799] [2024-11-02 12:23:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:23:47,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765648799] [2024-11-02 12:23:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765648799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102586718] [2024-11-02 12:23:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:47,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:47,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:47,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:23:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:47,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-02 12:23:47,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:23:48,023 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:48,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102586718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:48,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:48,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2024-11-02 12:23:48,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189949714] [2024-11-02 12:23:48,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:48,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:23:48,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:23:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:23:48,025 INFO L87 Difference]: Start difference. First operand 3232 states and 5067 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-02 12:23:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:50,096 INFO L93 Difference]: Finished difference Result 6803 states and 10659 transitions. [2024-11-02 12:23:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:23:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2024-11-02 12:23:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:50,133 INFO L225 Difference]: With dead ends: 6803 [2024-11-02 12:23:50,133 INFO L226 Difference]: Without dead ends: 3583 [2024-11-02 12:23:50,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:23:50,157 INFO L432 NwaCegarLoop]: 608 mSDtfsCounter, 1064 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:50,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 1946 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-02 12:23:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2024-11-02 12:23:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 3572. [2024-11-02 12:23:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 2494 states have (on average 1.4939855653568566) internal successors, (3726), 2651 states have internal predecessors, (3726), 848 states have call successors, (848), 238 states have call predecessors, (848), 229 states have return successors, (953), 778 states have call predecessors, (953), 842 states have call successors, (953) [2024-11-02 12:23:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 5527 transitions. [2024-11-02 12:23:50,440 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 5527 transitions. Word has length 94 [2024-11-02 12:23:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:50,441 INFO L471 AbstractCegarLoop]: Abstraction has 3572 states and 5527 transitions. [2024-11-02 12:23:50,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-02 12:23:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 5527 transitions. [2024-11-02 12:23:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-02 12:23:50,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:50,444 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:50,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:23:50,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:50,645 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:50,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash 573849948, now seen corresponding path program 1 times [2024-11-02 12:23:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:50,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256424709] [2024-11-02 12:23:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:23:51,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:51,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256424709] [2024-11-02 12:23:51,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256424709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:51,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275598279] [2024-11-02 12:23:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:51,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:51,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:51,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:51,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:23:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:51,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:23:51,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:23:52,007 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:52,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275598279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:52,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:52,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-02 12:23:52,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177059980] [2024-11-02 12:23:52,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:52,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:23:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:23:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:23:52,010 INFO L87 Difference]: Start difference. First operand 3572 states and 5527 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-02 12:23:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:52,752 INFO L93 Difference]: Finished difference Result 6373 states and 9883 transitions. [2024-11-02 12:23:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:23:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2024-11-02 12:23:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:52,800 INFO L225 Difference]: With dead ends: 6373 [2024-11-02 12:23:52,800 INFO L226 Difference]: Without dead ends: 3622 [2024-11-02 12:23:52,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:23:52,821 INFO L432 NwaCegarLoop]: 588 mSDtfsCounter, 0 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:52,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2934 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:23:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2024-11-02 12:23:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 3622. [2024-11-02 12:23:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 2534 states have (on average 1.4861878453038675) internal successors, (3766), 2691 states have internal predecessors, (3766), 848 states have call successors, (848), 238 states have call predecessors, (848), 239 states have return successors, (973), 788 states have call predecessors, (973), 842 states have call successors, (973) [2024-11-02 12:23:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5587 transitions. [2024-11-02 12:23:53,156 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5587 transitions. Word has length 99 [2024-11-02 12:23:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:53,157 INFO L471 AbstractCegarLoop]: Abstraction has 3622 states and 5587 transitions. [2024-11-02 12:23:53,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-02 12:23:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5587 transitions. [2024-11-02 12:23:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-02 12:23:53,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:53,163 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:53,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:23:53,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-02 12:23:53,365 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:53,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2016524804, now seen corresponding path program 1 times [2024-11-02 12:23:53,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:53,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322290795] [2024-11-02 12:23:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:53,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-02 12:23:54,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322290795] [2024-11-02 12:23:54,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322290795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65788174] [2024-11-02 12:23:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:54,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:54,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:54,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c7a2ec2-bb44-4145-addd-5ed3360c7dea/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:23:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:54,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-02 12:23:54,667 INFO L278 TraceCheckSpWp]: Computing forward predicates...