./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX --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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:10:21,555 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:10:21,687 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:10:21,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:10:21,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:10:21,733 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:10:21,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:10:21,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:10:21,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:10:21,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:10:21,742 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:10:21,743 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:10:21,743 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:10:21,744 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:10:21,744 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:10:21,745 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:10:21,745 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:10:21,746 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:10:21,746 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:10:21,746 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:10:21,747 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:10:21,748 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:10:21,748 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:10:21,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:10:21,750 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:10:21,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:10:21,750 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:10:21,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:10:21,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:10:21,752 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:10:21,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:10:21,753 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:10:21,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:10:21,754 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:10:21,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:10:21,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:10:21,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:21,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:10:21,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:10:21,773 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:10:21,773 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:10:21,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:10:21,774 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:10:21,774 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:10:21,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:10:21,776 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_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2023-11-12 00:10:22,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:10:22,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:10:22,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:10:22,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:10:22,177 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:10:22,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2023-11-12 00:10:25,356 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:10:25,756 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:10:25,763 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2023-11-12 00:10:25,793 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/data/6590b394f/6130fff6559a4274a808075e4be1881c/FLAG6fde9f92b [2023-11-12 00:10:25,806 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/data/6590b394f/6130fff6559a4274a808075e4be1881c [2023-11-12 00:10:25,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:10:25,810 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:10:25,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:25,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:10:25,817 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:10:25,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:25" (1/1) ... [2023-11-12 00:10:25,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6c461c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:25, skipping insertion in model container [2023-11-12 00:10:25,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:25" (1/1) ... [2023-11-12 00:10:25,925 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:10:26,450 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2023-11-12 00:10:26,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:26,621 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:10:26,632 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-12 00:10:26,634 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [716] [2023-11-12 00:10:26,634 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [754] [2023-11-12 00:10:26,635 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1120] [2023-11-12 00:10:26,635 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1220] [2023-11-12 00:10:26,636 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1340] [2023-11-12 00:10:26,636 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [1358] [2023-11-12 00:10:26,637 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1548] [2023-11-12 00:10:26,637 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1897] [2023-11-12 00:10:26,638 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1906] [2023-11-12 00:10:26,702 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2023-11-12 00:10:26,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:26,771 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:10:26,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26 WrapperNode [2023-11-12 00:10:26,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:26,773 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:26,773 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:10:26,773 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:10:26,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,811 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,867 INFO L138 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 927 [2023-11-12 00:10:26,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:26,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:10:26,871 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:10:26,871 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:10:26,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,900 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,900 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,973 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:10:26,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:10:26,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:10:26,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:10:26,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (1/1) ... [2023-11-12 00:10:26,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:27,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:27,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:10:27,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:10:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:10:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-12 00:10:27,163 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-12 00:10:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 00:10:27,163 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 00:10:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 00:10:27,163 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 00:10:27,164 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 00:10:27,165 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 00:10:27,165 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-12 00:10:27,165 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-12 00:10:27,166 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 00:10:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 00:10:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-12 00:10:27,168 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-12 00:10:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 00:10:27,168 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 00:10:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 00:10:27,171 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 00:10:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 00:10:27,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 00:10:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 00:10:27,172 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 00:10:27,172 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 00:10:27,172 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 00:10:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 00:10:27,173 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 00:10:27,173 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-12 00:10:27,173 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-12 00:10:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-12 00:10:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-12 00:10:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 00:10:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 00:10:27,174 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 00:10:27,174 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 00:10:27,175 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-12 00:10:27,175 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-12 00:10:27,175 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 00:10:27,175 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 00:10:27,175 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 00:10:27,175 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 00:10:27,176 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 00:10:27,176 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 00:10:27,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:10:27,176 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-12 00:10:27,176 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-12 00:10:27,176 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 00:10:27,177 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 00:10:27,177 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 00:10:27,177 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 00:10:27,178 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 00:10:27,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 00:10:27,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:10:27,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:10:27,180 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 00:10:27,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 00:10:27,330 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:10:27,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:10:28,506 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:10:29,511 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:10:29,511 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:10:29,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:29 BoogieIcfgContainer [2023-11-12 00:10:29,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:10:29,522 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:10:29,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:10:29,526 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:10:29,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:10:25" (1/3) ... [2023-11-12 00:10:29,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109e939c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:29, skipping insertion in model container [2023-11-12 00:10:29,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:26" (2/3) ... [2023-11-12 00:10:29,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109e939c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:29, skipping insertion in model container [2023-11-12 00:10:29,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:29" (3/3) ... [2023-11-12 00:10:29,531 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2023-11-12 00:10:29,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:10:29,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:10:29,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:10:29,649 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d388513, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:10:29,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:10:29,660 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) [2023-11-12 00:10:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 00:10:29,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:29,698 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:29,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:29,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash 882097340, now seen corresponding path program 1 times [2023-11-12 00:10:29,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:29,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826995758] [2023-11-12 00:10:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:29,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:30,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826995758] [2023-11-12 00:10:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826995758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:30,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:30,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:10:30,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728111992] [2023-11-12 00:10:30,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:30,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:10:30,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:10:30,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:10:30,994 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), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 00:10:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:32,280 INFO L93 Difference]: Finished difference Result 1137 states and 1819 transitions. [2023-11-12 00:10:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:32,283 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), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2023-11-12 00:10:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:32,306 INFO L225 Difference]: With dead ends: 1137 [2023-11-12 00:10:32,306 INFO L226 Difference]: Without dead ends: 735 [2023-11-12 00:10:32,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:10:32,321 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 520 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:32,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 2828 Invalid, 739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:10:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2023-11-12 00:10:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 729. [2023-11-12 00:10:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 489 states have (on average 1.5010224948875255) internal successors, (734), 519 states have internal predecessors, (734), 194 states have call successors, (194), 49 states have call predecessors, (194), 45 states have return successors, (195), 185 states have call predecessors, (195), 190 states have call successors, (195) [2023-11-12 00:10:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1123 transitions. [2023-11-12 00:10:32,500 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1123 transitions. Word has length 75 [2023-11-12 00:10:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:32,501 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 1123 transitions. [2023-11-12 00:10:32,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 00:10:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1123 transitions. [2023-11-12 00:10:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-12 00:10:32,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:32,510 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:32,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:10:32,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:32,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1268466804, now seen corresponding path program 1 times [2023-11-12 00:10:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:32,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755662880] [2023-11-12 00:10:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:33,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:33,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755662880] [2023-11-12 00:10:33,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755662880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:33,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:33,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:10:33,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207960361] [2023-11-12 00:10:33,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:33,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:10:33,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:33,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:10:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:10:33,228 INFO L87 Difference]: Start difference. First operand 729 states and 1123 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-12 00:10:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:34,039 INFO L93 Difference]: Finished difference Result 2150 states and 3374 transitions. [2023-11-12 00:10:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:10:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 81 [2023-11-12 00:10:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:34,053 INFO L225 Difference]: With dead ends: 2150 [2023-11-12 00:10:34,053 INFO L226 Difference]: Without dead ends: 1433 [2023-11-12 00:10:34,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:10:34,062 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 626 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:34,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 2952 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:10:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2023-11-12 00:10:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1365. [2023-11-12 00:10:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 933 states have (on average 1.504823151125402) internal successors, (1404), 991 states have internal predecessors, (1404), 347 states have call successors, (347), 91 states have call predecessors, (347), 84 states have return successors, (376), 320 states have call predecessors, (376), 341 states have call successors, (376) [2023-11-12 00:10:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2127 transitions. [2023-11-12 00:10:34,171 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2127 transitions. Word has length 81 [2023-11-12 00:10:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:34,172 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2127 transitions. [2023-11-12 00:10:34,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-12 00:10:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2127 transitions. [2023-11-12 00:10:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-12 00:10:34,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:34,177 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:34,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:10:34,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:34,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:34,178 INFO L85 PathProgramCache]: Analyzing trace with hash 805634010, now seen corresponding path program 1 times [2023-11-12 00:10:34,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:34,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713088414] [2023-11-12 00:10:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:34,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:10:34,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713088414] [2023-11-12 00:10:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713088414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225110510] [2023-11-12 00:10:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:34,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:34,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:10:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:34,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:10:34,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:35,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225110510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:35,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:10:35,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:10:35,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677304281] [2023-11-12 00:10:35,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:35,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:10:35,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:35,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:10:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:10:35,081 INFO L87 Difference]: Start difference. First operand 1365 states and 2127 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, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 00:10:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:35,448 INFO L93 Difference]: Finished difference Result 3905 states and 6243 transitions. [2023-11-12 00:10:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:10:35,448 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, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2023-11-12 00:10:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:35,472 INFO L225 Difference]: With dead ends: 3905 [2023-11-12 00:10:35,472 INFO L226 Difference]: Without dead ends: 2552 [2023-11-12 00:10:35,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:10:35,486 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 560 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:35,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1127 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:10:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2023-11-12 00:10:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2477. [2023-11-12 00:10:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 1703 states have (on average 1.5190839694656488) internal successors, (2587), 1819 states have internal predecessors, (2587), 616 states have call successors, (616), 162 states have call predecessors, (616), 157 states have return successors, (696), 571 states have call predecessors, (696), 610 states have call successors, (696) [2023-11-12 00:10:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3899 transitions. [2023-11-12 00:10:35,678 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3899 transitions. Word has length 79 [2023-11-12 00:10:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:35,678 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 3899 transitions. [2023-11-12 00:10:35,679 INFO L496 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, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 00:10:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3899 transitions. [2023-11-12 00:10:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-12 00:10:35,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:35,683 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:35,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:35,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:35,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1331937780, now seen corresponding path program 1 times [2023-11-12 00:10:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:35,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227233832] [2023-11-12 00:10:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:10:36,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:36,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227233832] [2023-11-12 00:10:36,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227233832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:36,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243969080] [2023-11-12 00:10:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:36,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:36,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:36,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:10:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:36,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:10:36,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:36,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243969080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:36,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:10:36,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:10:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376726492] [2023-11-12 00:10:36,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:36,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:10:36,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:10:36,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:10:36,896 INFO L87 Difference]: Start difference. First operand 2477 states and 3899 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 00:10:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:37,279 INFO L93 Difference]: Finished difference Result 5564 states and 8852 transitions. [2023-11-12 00:10:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:10:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 80 [2023-11-12 00:10:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:37,314 INFO L225 Difference]: With dead ends: 5564 [2023-11-12 00:10:37,318 INFO L226 Difference]: Without dead ends: 3099 [2023-11-12 00:10:37,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:10:37,343 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 558 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:37,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1098 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:10:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2023-11-12 00:10:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 3056. [2023-11-12 00:10:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 2109 states have (on average 1.530583214793741) internal successors, (3228), 2254 states have internal predecessors, (3228), 753 states have call successors, (753), 196 states have call predecessors, (753), 193 states have return successors, (852), 701 states have call predecessors, (852), 747 states have call successors, (852) [2023-11-12 00:10:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4833 transitions. [2023-11-12 00:10:37,607 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4833 transitions. Word has length 80 [2023-11-12 00:10:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:37,616 INFO L495 AbstractCegarLoop]: Abstraction has 3056 states and 4833 transitions. [2023-11-12 00:10:37,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 00:10:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4833 transitions. [2023-11-12 00:10:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-12 00:10:37,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:37,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:37,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:37,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:37,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -922219511, now seen corresponding path program 1 times [2023-11-12 00:10:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:37,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986743231] [2023-11-12 00:10:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:37,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:38,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986743231] [2023-11-12 00:10:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986743231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:38,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255343017] [2023-11-12 00:10:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:38,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:38,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:38,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:38,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:10:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:39,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:10:39,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:10:39,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:39,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255343017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:39,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:10:39,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-12 00:10:39,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320612774] [2023-11-12 00:10:39,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:10:39,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:10:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:10:39,195 INFO L87 Difference]: Start difference. First operand 3056 states and 4833 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-12 00:10:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:39,801 INFO L93 Difference]: Finished difference Result 6115 states and 9888 transitions. [2023-11-12 00:10:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:10:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 86 [2023-11-12 00:10:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:39,839 INFO L225 Difference]: With dead ends: 6115 [2023-11-12 00:10:39,839 INFO L226 Difference]: Without dead ends: 3876 [2023-11-12 00:10:39,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:10:39,862 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:39,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2387 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:10:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2023-11-12 00:10:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 3459. [2023-11-12 00:10:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 2337 states have (on average 1.5198973042362003) internal successors, (3552), 2541 states have internal predecessors, (3552), 923 states have call successors, (923), 196 states have call predecessors, (923), 198 states have return successors, (1048), 859 states have call predecessors, (1048), 917 states have call successors, (1048) [2023-11-12 00:10:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 5523 transitions. [2023-11-12 00:10:40,259 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 5523 transitions. Word has length 86 [2023-11-12 00:10:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:40,259 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 5523 transitions. [2023-11-12 00:10:40,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-12 00:10:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 5523 transitions. [2023-11-12 00:10:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-12 00:10:40,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:40,265 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:40,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:40,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:40,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:40,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:40,479 INFO L85 PathProgramCache]: Analyzing trace with hash -743671102, now seen corresponding path program 1 times [2023-11-12 00:10:40,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016698719] [2023-11-12 00:10:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:40,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:10:41,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016698719] [2023-11-12 00:10:41,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016698719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:41,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611057294] [2023-11-12 00:10:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:41,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:41,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:41,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:41,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:10:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:41,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:10:41,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:10:42,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:42,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611057294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:42,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:10:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-12 00:10:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410986464] [2023-11-12 00:10:42,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:10:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:10:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:10:42,082 INFO L87 Difference]: Start difference. First operand 3459 states and 5523 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 00:10:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:43,336 INFO L93 Difference]: Finished difference Result 6124 states and 9813 transitions. [2023-11-12 00:10:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2023-11-12 00:10:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:43,370 INFO L225 Difference]: With dead ends: 6124 [2023-11-12 00:10:43,370 INFO L226 Difference]: Without dead ends: 3498 [2023-11-12 00:10:43,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:10:43,433 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 436 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2940 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:43,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2940 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:10:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2023-11-12 00:10:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3495. [2023-11-12 00:10:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2361 states have (on average 1.5146124523506987) internal successors, (3576), 2561 states have internal predecessors, (3576), 923 states have call successors, (923), 200 states have call predecessors, (923), 210 states have return successors, (1064), 871 states have call predecessors, (1064), 917 states have call successors, (1064) [2023-11-12 00:10:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5563 transitions. [2023-11-12 00:10:43,729 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5563 transitions. Word has length 89 [2023-11-12 00:10:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:43,730 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5563 transitions. [2023-11-12 00:10:43,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 00:10:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5563 transitions. [2023-11-12 00:10:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-12 00:10:43,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:43,741 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-12 00:10:43,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:43,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:43,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:43,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 996357136, now seen corresponding path program 1 times [2023-11-12 00:10:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:43,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730242649] [2023-11-12 00:10:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:43,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:10:44,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:44,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730242649] [2023-11-12 00:10:44,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730242649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:44,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135601801] [2023-11-12 00:10:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:44,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:44,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:44,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:44,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:10:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:45,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 00:10:45,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:10:45,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:10:45,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135601801] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:45,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:10:45,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2023-11-12 00:10:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174628876] [2023-11-12 00:10:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:45,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:10:45,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:10:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:10:45,770 INFO L87 Difference]: Start difference. First operand 3495 states and 5563 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-12 00:10:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:50,155 INFO L93 Difference]: Finished difference Result 9159 states and 15255 transitions. [2023-11-12 00:10:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 00:10:50,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 91 [2023-11-12 00:10:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:50,224 INFO L225 Difference]: With dead ends: 9159 [2023-11-12 00:10:50,225 INFO L226 Difference]: Without dead ends: 6871 [2023-11-12 00:10:50,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:10:50,257 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 3016 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3105 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:50,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3105 Valid, 2522 Invalid, 3239 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1363 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-12 00:10:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2023-11-12 00:10:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5998. [2023-11-12 00:10:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1854), 1280 states have call predecessors, (1854), 1333 states have call successors, (1854) [2023-11-12 00:10:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9693 transitions. [2023-11-12 00:10:50,829 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9693 transitions. Word has length 91 [2023-11-12 00:10:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:50,830 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9693 transitions. [2023-11-12 00:10:50,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-12 00:10:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9693 transitions. [2023-11-12 00:10:50,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-12 00:10:50,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:50,836 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:50,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:51,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:51,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:51,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash -953566422, now seen corresponding path program 1 times [2023-11-12 00:10:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:51,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989653198] [2023-11-12 00:10:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:51,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:10:51,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989653198] [2023-11-12 00:10:51,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989653198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15014552] [2023-11-12 00:10:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:51,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:51,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:51,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:10:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:52,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 1621 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:10:52,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:10:52,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:52,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15014552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:52,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:10:52,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-12 00:10:52,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978673614] [2023-11-12 00:10:52,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:52,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:10:52,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:10:52,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:10:52,429 INFO L87 Difference]: Start difference. First operand 5998 states and 9693 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-12 00:10:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:53,696 INFO L93 Difference]: Finished difference Result 10805 states and 17544 transitions. [2023-11-12 00:10:53,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:10:53,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2023-11-12 00:10:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:53,769 INFO L225 Difference]: With dead ends: 10805 [2023-11-12 00:10:53,769 INFO L226 Difference]: Without dead ends: 6014 [2023-11-12 00:10:53,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:10:53,801 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 419 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:53,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2389 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:10:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2023-11-12 00:10:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 5998. [2023-11-12 00:10:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4247 states have (on average 1.530021191429244) internal successors, (6498), 4483 states have internal predecessors, (6498), 1341 states have call successors, (1341), 378 states have call predecessors, (1341), 409 states have return successors, (1846), 1280 states have call predecessors, (1846), 1333 states have call successors, (1846) [2023-11-12 00:10:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9685 transitions. [2023-11-12 00:10:54,475 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9685 transitions. Word has length 96 [2023-11-12 00:10:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:54,476 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9685 transitions. [2023-11-12 00:10:54,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-12 00:10:54,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9685 transitions. [2023-11-12 00:10:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 00:10:54,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:54,485 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:54,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:54,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:54,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:54,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash -629313602, now seen corresponding path program 1 times [2023-11-12 00:10:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:54,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113083410] [2023-11-12 00:10:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 00:10:55,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:55,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113083410] [2023-11-12 00:10:55,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113083410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:55,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074292080] [2023-11-12 00:10:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:55,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:55,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:55,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:55,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:10:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:56,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:10:56,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:10:56,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:56,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074292080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:56,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:10:56,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-12 00:10:56,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758545889] [2023-11-12 00:10:56,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:56,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:10:56,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:56,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:10:56,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:10:56,224 INFO L87 Difference]: Start difference. First operand 5998 states and 9685 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:10:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:56,892 INFO L93 Difference]: Finished difference Result 11449 states and 18974 transitions. [2023-11-12 00:10:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2023-11-12 00:10:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:56,948 INFO L225 Difference]: With dead ends: 11449 [2023-11-12 00:10:56,949 INFO L226 Difference]: Without dead ends: 6296 [2023-11-12 00:10:56,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:10:56,980 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 13 mSDsluCounter, 3017 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3629 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:56,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3629 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:10:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2023-11-12 00:10:57,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6204. [2023-11-12 00:10:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 4383 states have (on average 1.5144877937485741) internal successors, (6638), 4639 states have internal predecessors, (6638), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1330 states have call predecessors, (2231), 1343 states have call successors, (2231) [2023-11-12 00:10:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 10220 transitions. [2023-11-12 00:10:57,489 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 10220 transitions. Word has length 122 [2023-11-12 00:10:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:57,489 INFO L495 AbstractCegarLoop]: Abstraction has 6204 states and 10220 transitions. [2023-11-12 00:10:57,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:10:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 10220 transitions. [2023-11-12 00:10:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-12 00:10:57,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:57,496 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:57,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:57,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:57,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:57,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash 512384276, now seen corresponding path program 1 times [2023-11-12 00:10:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870144362] [2023-11-12 00:10:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:57,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 00:10:58,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:58,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870144362] [2023-11-12 00:10:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870144362] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:58,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388990996] [2023-11-12 00:10:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:58,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:58,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:58,634 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:58,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:10:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:59,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:10:59,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:10:59,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:10:59,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388990996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:59,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:10:59,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-12 00:10:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139489403] [2023-11-12 00:10:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:59,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:10:59,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:10:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:10:59,206 INFO L87 Difference]: Start difference. First operand 6204 states and 10220 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:10:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:59,998 INFO L93 Difference]: Finished difference Result 11797 states and 19795 transitions. [2023-11-12 00:10:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:10:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 125 [2023-11-12 00:10:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:00,041 INFO L225 Difference]: With dead ends: 11797 [2023-11-12 00:11:00,041 INFO L226 Difference]: Without dead ends: 6446 [2023-11-12 00:11:00,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:11:00,068 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 13 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3598 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:00,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3598 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:11:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6446 states. [2023-11-12 00:11:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6446 to 6232. [2023-11-12 00:11:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 4411 states have (on average 1.5112219451371571) internal successors, (6666), 4639 states have internal predecessors, (6666), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1358 states have call predecessors, (2231), 1343 states have call successors, (2231) [2023-11-12 00:11:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 10248 transitions. [2023-11-12 00:11:00,586 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 10248 transitions. Word has length 125 [2023-11-12 00:11:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:00,586 INFO L495 AbstractCegarLoop]: Abstraction has 6232 states and 10248 transitions. [2023-11-12 00:11:00,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:11:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 10248 transitions. [2023-11-12 00:11:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-12 00:11:00,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:00,594 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:00,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:11:00,804 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:00,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1491089176, now seen corresponding path program 1 times [2023-11-12 00:11:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:00,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561404838] [2023-11-12 00:11:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:00,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:11:01,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:01,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561404838] [2023-11-12 00:11:01,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561404838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:01,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391126568] [2023-11-12 00:11:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:01,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:01,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:01,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:01,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:11:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:02,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:11:02,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:11:02,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:02,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391126568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:02,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:02,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-12 00:11:02,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527437328] [2023-11-12 00:11:02,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:02,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:11:02,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:11:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:11:02,254 INFO L87 Difference]: Start difference. First operand 6232 states and 10248 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:11:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:02,988 INFO L93 Difference]: Finished difference Result 11853 states and 19851 transitions. [2023-11-12 00:11:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:11:02,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 124 [2023-11-12 00:11:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:03,035 INFO L225 Difference]: With dead ends: 11853 [2023-11-12 00:11:03,035 INFO L226 Difference]: Without dead ends: 6474 [2023-11-12 00:11:03,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:11:03,070 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 13 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:03,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3603 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:11:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2023-11-12 00:11:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 6260. [2023-11-12 00:11:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 4439 states have (on average 1.5079972966884434) internal successors, (6694), 4639 states have internal predecessors, (6694), 1351 states have call successors, (1351), 378 states have call predecessors, (1351), 469 states have return successors, (2231), 1386 states have call predecessors, (2231), 1343 states have call successors, (2231) [2023-11-12 00:11:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 10276 transitions. [2023-11-12 00:11:03,561 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 10276 transitions. Word has length 124 [2023-11-12 00:11:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:03,561 INFO L495 AbstractCegarLoop]: Abstraction has 6260 states and 10276 transitions. [2023-11-12 00:11:03,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:11:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 10276 transitions. [2023-11-12 00:11:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 00:11:03,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:03,573 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:03,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:03,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:11:03,784 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:03,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:03,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1116285936, now seen corresponding path program 1 times [2023-11-12 00:11:03,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:03,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615341485] [2023-11-12 00:11:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:03,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:11:04,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:04,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615341485] [2023-11-12 00:11:04,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615341485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:04,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143624140] [2023-11-12 00:11:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:04,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:04,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:04,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:11:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:05,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:11:05,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:11:05,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:05,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143624140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:05,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:05,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-12 00:11:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027893373] [2023-11-12 00:11:05,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:05,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:11:05,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:11:05,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:11:05,143 INFO L87 Difference]: Start difference. First operand 6260 states and 10276 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:11:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:05,892 INFO L93 Difference]: Finished difference Result 12940 states and 21908 transitions. [2023-11-12 00:11:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:11:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 135 [2023-11-12 00:11:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:05,953 INFO L225 Difference]: With dead ends: 12940 [2023-11-12 00:11:05,954 INFO L226 Difference]: Without dead ends: 6025 [2023-11-12 00:11:06,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:11:06,001 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 253 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:06,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 2858 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:11:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6025 states. [2023-11-12 00:11:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6025 to 6008. [2023-11-12 00:11:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6008 states, 4240 states have (on average 1.4792452830188678) internal successors, (6272), 4436 states have internal predecessors, (6272), 1314 states have call successors, (1314), 372 states have call predecessors, (1314), 453 states have return successors, (2146), 1343 states have call predecessors, (2146), 1306 states have call successors, (2146) [2023-11-12 00:11:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6008 states to 6008 states and 9732 transitions. [2023-11-12 00:11:06,559 INFO L78 Accepts]: Start accepts. Automaton has 6008 states and 9732 transitions. Word has length 135 [2023-11-12 00:11:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:06,563 INFO L495 AbstractCegarLoop]: Abstraction has 6008 states and 9732 transitions. [2023-11-12 00:11:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 00:11:06,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6008 states and 9732 transitions. [2023-11-12 00:11:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-12 00:11:06,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:06,576 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:06,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:06,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0df7e573-8618-4fdb-bb1b-544c672ab142/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:11:06,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:06,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:06,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1845785504, now seen corresponding path program 1 times [2023-11-12 00:11:06,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:06,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345016768] [2023-11-12 00:11:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:06,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat