./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:53:22,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:53:22,972 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:53:22,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:53:22,983 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:53:23,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:53:23,035 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:53:23,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:53:23,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:53:23,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:53:23,045 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:53:23,047 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:53:23,048 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:53:23,050 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:53:23,050 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:53:23,051 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:53:23,051 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:53:23,052 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:53:23,052 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:53:23,053 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:53:23,054 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:53:23,054 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:53:23,056 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:53:23,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:53:23,057 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:53:23,057 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:53:23,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:53:23,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:53:23,059 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:53:23,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:53:23,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:53:23,061 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:53:23,061 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:53:23,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:53:23,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:53:23,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:53:23,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:53:23,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:53:23,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:53:23,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:53:23,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:53:23,065 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:53:23,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:53:23,066 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:53:23,066 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:53:23,067 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:53:23,067 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:53:23,067 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_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c [2023-11-24 23:53:23,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:53:23,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:53:23,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:53:23,425 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:53:23,426 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:53:23,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2023-11-24 23:53:26,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:53:27,055 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:53:27,056 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2023-11-24 23:53:27,101 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/data/4cc73f1f2/ae160f5969ee4fb69fc4442b806f6ca6/FLAG4663009d4 [2023-11-24 23:53:27,118 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/data/4cc73f1f2/ae160f5969ee4fb69fc4442b806f6ca6 [2023-11-24 23:53:27,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:53:27,127 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:53:27,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:53:27,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:53:27,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:53:27,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:53:27" (1/1) ... [2023-11-24 23:53:27,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34afaf08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:27, skipping insertion in model container [2023-11-24 23:53:27,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:53:27" (1/1) ... [2023-11-24 23:53:27,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:53:27,486 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_69c487cc-b46e-4dfa-9d92-f4219b8f951f/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2023-11-24 23:53:27,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:53:27,861 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:53:27,871 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-24 23:53:27,873 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [67] [2023-11-24 23:53:27,873 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [259] [2023-11-24 23:53:27,873 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [268] [2023-11-24 23:53:27,874 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [366] [2023-11-24 23:53:27,874 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1033] [2023-11-24 23:53:27,874 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1399] [2023-11-24 23:53:27,874 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2844] [2023-11-24 23:53:27,874 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3195] [2023-11-24 23:53:27,875 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3313] [2023-11-24 23:53:27,884 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_69c487cc-b46e-4dfa-9d92-f4219b8f951f/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2023-11-24 23:53:28,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:53:28,057 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:53:28,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28 WrapperNode [2023-11-24 23:53:28,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:53:28,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:53:28,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:53:28,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:53:28,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,100 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,153 INFO L138 Inliner]: procedures = 88, calls = 338, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 797 [2023-11-24 23:53:28,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:53:28,155 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:53:28,155 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:53:28,155 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:53:28,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,235 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:53:28,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:53:28,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:53:28,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:53:28,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (1/1) ... [2023-11-24 23:53:28,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:53:28,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:28,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:53:28,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:53:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:53:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-24 23:53:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-24 23:53:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:53:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:53:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:53:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:53:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-24 23:53:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-24 23:53:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:53:28,345 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:53:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:53:28,345 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:53:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:53:28,345 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:53:28,346 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:53:28,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:53:28,346 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:53:28,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:53:28,346 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:53:28,347 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:53:28,347 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:53:28,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:53:28,347 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-24 23:53:28,347 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-24 23:53:28,347 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:53:28,348 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:53:28,348 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-24 23:53:28,348 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-24 23:53:28,348 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:53:28,348 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:53:28,348 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:53:28,349 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:53:28,349 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:53:28,349 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:53:28,349 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:53:28,349 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:53:28,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:53:28,350 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-24 23:53:28,350 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-24 23:53:28,350 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:53:28,350 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:53:28,350 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:53:28,351 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:53:28,351 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:53:28,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:53:28,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:53:28,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:53:28,351 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:53:28,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:53:28,499 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:53:28,502 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:53:29,828 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:53:30,712 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:53:30,712 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:53:30,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:53:30 BoogieIcfgContainer [2023-11-24 23:53:30,715 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:53:30,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:53:30,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:53:30,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:53:30,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:53:27" (1/3) ... [2023-11-24 23:53:30,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be44c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:53:30, skipping insertion in model container [2023-11-24 23:53:30,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:53:28" (2/3) ... [2023-11-24 23:53:30,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be44c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:53:30, skipping insertion in model container [2023-11-24 23:53:30,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:53:30" (3/3) ... [2023-11-24 23:53:30,726 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2023-11-24 23:53:30,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:53:30,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:53:30,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:53:30,842 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;@5dccec75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:53:30,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:53:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-24 23:53:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-24 23:53:30,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:30,869 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] [2023-11-24 23:53:30,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:30,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1593585822, now seen corresponding path program 1 times [2023-11-24 23:53:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:30,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751963717] [2023-11-24 23:53:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:30,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:53:31,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751963717] [2023-11-24 23:53:31,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751963717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:31,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135668796] [2023-11-24 23:53:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:31,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:31,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:31,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:31,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:53:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:32,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:53:32,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:32,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:32,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135668796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:32,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:32,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 23:53:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328227777] [2023-11-24 23:53:32,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:53:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:32,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:53:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:32,512 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 23:53:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:32,941 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2023-11-24 23:53:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:53:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2023-11-24 23:53:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:32,971 INFO L225 Difference]: With dead ends: 1074 [2023-11-24 23:53:32,971 INFO L226 Difference]: Without dead ends: 693 [2023-11-24 23:53:32,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:32,991 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 492 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:32,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1535 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:53:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-24 23:53:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2023-11-24 23:53:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2023-11-24 23:53:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2023-11-24 23:53:33,202 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2023-11-24 23:53:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:33,203 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2023-11-24 23:53:33,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 23:53:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2023-11-24 23:53:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-24 23:53:33,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:33,218 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] [2023-11-24 23:53:33,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:33,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:53:33,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:33,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash 587561269, now seen corresponding path program 1 times [2023-11-24 23:53:33,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:33,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20752866] [2023-11-24 23:53:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:33,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:53:33,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:33,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20752866] [2023-11-24 23:53:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20752866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:33,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790199747] [2023-11-24 23:53:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:33,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:33,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:33,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:53:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:34,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:53:34,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:34,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790199747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:34,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:34,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 23:53:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006877022] [2023-11-24 23:53:34,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:34,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:53:34,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:53:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:34,346 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-24 23:53:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:34,618 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2023-11-24 23:53:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:53:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2023-11-24 23:53:34,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:34,633 INFO L225 Difference]: With dead ends: 1666 [2023-11-24 23:53:34,633 INFO L226 Difference]: Without dead ends: 997 [2023-11-24 23:53:34,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:34,640 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 549 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:34,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1033 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:53:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-11-24 23:53:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2023-11-24 23:53:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2023-11-24 23:53:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2023-11-24 23:53:34,745 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2023-11-24 23:53:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:34,746 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2023-11-24 23:53:34,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-24 23:53:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2023-11-24 23:53:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-24 23:53:34,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:34,754 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] [2023-11-24 23:53:34,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:34,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:34,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:34,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:34,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1243175374, now seen corresponding path program 1 times [2023-11-24 23:53:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:34,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756961500] [2023-11-24 23:53:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:34,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:53:35,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:35,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756961500] [2023-11-24 23:53:35,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756961500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:35,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563884850] [2023-11-24 23:53:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:35,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:35,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:35,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:35,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:53:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:35,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:53:35,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:35,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:35,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563884850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:35,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:35,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-24 23:53:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95318544] [2023-11-24 23:53:35,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:35,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:53:35,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:53:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:35,850 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 23:53:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:36,226 INFO L93 Difference]: Finished difference Result 2778 states and 4510 transitions. [2023-11-24 23:53:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:53:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2023-11-24 23:53:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:36,242 INFO L225 Difference]: With dead ends: 2778 [2023-11-24 23:53:36,243 INFO L226 Difference]: Without dead ends: 1817 [2023-11-24 23:53:36,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:36,252 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 481 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:36,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1093 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:53:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2023-11-24 23:53:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1795. [2023-11-24 23:53:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1216 states have (on average 1.544407894736842) internal successors, (1878), 1306 states have internal predecessors, (1878), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2023-11-24 23:53:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2849 transitions. [2023-11-24 23:53:36,399 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2849 transitions. Word has length 64 [2023-11-24 23:53:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:36,400 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2849 transitions. [2023-11-24 23:53:36,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 23:53:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2849 transitions. [2023-11-24 23:53:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:53:36,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:36,404 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] [2023-11-24 23:53:36,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:36,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:36,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:36,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:36,623 INFO L85 PathProgramCache]: Analyzing trace with hash -85380606, now seen corresponding path program 1 times [2023-11-24 23:53:36,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:36,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821718730] [2023-11-24 23:53:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:36,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:53:37,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:37,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821718730] [2023-11-24 23:53:37,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821718730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125947164] [2023-11-24 23:53:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:37,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:37,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:37,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:53:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:37,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:53:37,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:37,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125947164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:37,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-24 23:53:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422207354] [2023-11-24 23:53:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:37,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:53:37,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:53:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:53:37,531 INFO L87 Difference]: Start difference. First operand 1795 states and 2849 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 23:53:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:37,976 INFO L93 Difference]: Finished difference Result 3490 states and 5650 transitions. [2023-11-24 23:53:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:53:37,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2023-11-24 23:53:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:38,006 INFO L225 Difference]: With dead ends: 3490 [2023-11-24 23:53:38,006 INFO L226 Difference]: Without dead ends: 2337 [2023-11-24 23:53:38,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:53:38,018 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 139 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:38,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1716 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:53:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2023-11-24 23:53:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2071. [2023-11-24 23:53:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1358 states have (on average 1.5316642120765833) internal successors, (2080), 1487 states have internal predecessors, (2080), 599 states have call successors, (599), 112 states have call predecessors, (599), 113 states have return successors, (646), 582 states have call predecessors, (646), 595 states have call successors, (646) [2023-11-24 23:53:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 3325 transitions. [2023-11-24 23:53:38,259 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 3325 transitions. Word has length 68 [2023-11-24 23:53:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:38,260 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 3325 transitions. [2023-11-24 23:53:38,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 23:53:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 3325 transitions. [2023-11-24 23:53:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-24 23:53:38,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:38,265 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] [2023-11-24 23:53:38,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:38,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:38,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:38,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash -377728026, now seen corresponding path program 1 times [2023-11-24 23:53:38,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:38,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129568302] [2023-11-24 23:53:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:53:39,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:39,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129568302] [2023-11-24 23:53:39,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129568302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:39,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183590940] [2023-11-24 23:53:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:39,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:39,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:39,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:53:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:39,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:53:39,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:53:39,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:39,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183590940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:39,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:39,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-24 23:53:39,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486989135] [2023-11-24 23:53:39,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:39,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:53:39,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:39,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:53:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:39,558 INFO L87 Difference]: Start difference. First operand 2071 states and 3325 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:53:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:40,422 INFO L93 Difference]: Finished difference Result 3726 states and 5957 transitions. [2023-11-24 23:53:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:53:40,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2023-11-24 23:53:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:40,442 INFO L225 Difference]: With dead ends: 3726 [2023-11-24 23:53:40,442 INFO L226 Difference]: Without dead ends: 2306 [2023-11-24 23:53:40,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:53:40,454 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 539 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:40,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1709 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:53:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2023-11-24 23:53:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2287. [2023-11-24 23:53:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.5163185378590078) internal successors, (2323), 1664 states have internal predecessors, (2323), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2023-11-24 23:53:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3625 transitions. [2023-11-24 23:53:40,624 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3625 transitions. Word has length 72 [2023-11-24 23:53:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:40,626 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3625 transitions. [2023-11-24 23:53:40,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:53:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3625 transitions. [2023-11-24 23:53:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-24 23:53:40,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:40,630 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] [2023-11-24 23:53:40,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:40,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:40,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:40,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:40,845 INFO L85 PathProgramCache]: Analyzing trace with hash -123319056, now seen corresponding path program 1 times [2023-11-24 23:53:40,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:40,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894592683] [2023-11-24 23:53:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:40,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:53:41,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:41,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894592683] [2023-11-24 23:53:41,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894592683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:41,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638447301] [2023-11-24 23:53:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:41,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:41,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:41,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:41,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:53:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:41,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:53:41,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:53:41,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:41,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638447301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:41,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:41,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-24 23:53:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467900236] [2023-11-24 23:53:41,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:53:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:53:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:53:41,683 INFO L87 Difference]: Start difference. First operand 2287 states and 3625 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 23:53:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:42,031 INFO L93 Difference]: Finished difference Result 4310 states and 6908 transitions. [2023-11-24 23:53:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:53:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2023-11-24 23:53:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:42,051 INFO L225 Difference]: With dead ends: 4310 [2023-11-24 23:53:42,051 INFO L226 Difference]: Without dead ends: 2287 [2023-11-24 23:53:42,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:42,067 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 282 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:42,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1535 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:53:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2023-11-24 23:53:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2287. [2023-11-24 23:53:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.481070496083551) internal successors, (2269), 1664 states have internal predecessors, (2269), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2023-11-24 23:53:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3571 transitions. [2023-11-24 23:53:42,258 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3571 transitions. Word has length 73 [2023-11-24 23:53:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:42,259 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3571 transitions. [2023-11-24 23:53:42,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 23:53:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3571 transitions. [2023-11-24 23:53:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-24 23:53:42,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:42,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:42,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:42,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:42,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:42,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash 928321124, now seen corresponding path program 1 times [2023-11-24 23:53:42,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:42,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60804926] [2023-11-24 23:53:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:53:42,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:42,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60804926] [2023-11-24 23:53:42,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60804926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:42,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336840328] [2023-11-24 23:53:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:42,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:42,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:42,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:42,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:53:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:43,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 23:53:43,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:53:43,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:53:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:53:43,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336840328] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:43,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:53:43,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2023-11-24 23:53:43,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503470242] [2023-11-24 23:53:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:43,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:53:43,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:53:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:53:43,782 INFO L87 Difference]: Start difference. First operand 2287 states and 3571 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-24 23:53:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:47,302 INFO L93 Difference]: Finished difference Result 5619 states and 9003 transitions. [2023-11-24 23:53:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 23:53:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2023-11-24 23:53:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:47,337 INFO L225 Difference]: With dead ends: 5619 [2023-11-24 23:53:47,337 INFO L226 Difference]: Without dead ends: 4200 [2023-11-24 23:53:47,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2023-11-24 23:53:47,353 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 1794 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:47,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 3064 Invalid, 2962 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [806 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-24 23:53:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2023-11-24 23:53:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3559. [2023-11-24 23:53:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2023-11-24 23:53:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2023-11-24 23:53:47,743 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2023-11-24 23:53:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:47,743 INFO L495 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2023-11-24 23:53:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-24 23:53:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2023-11-24 23:53:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:53:47,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:47,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:47,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:47,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 23:53:47,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:47,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:47,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1267124505, now seen corresponding path program 1 times [2023-11-24 23:53:47,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:47,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357233434] [2023-11-24 23:53:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:47,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:53:48,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:48,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357233434] [2023-11-24 23:53:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357233434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:48,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688485492] [2023-11-24 23:53:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:48,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:48,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:48,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:48,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:53:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:48,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:53:48,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:53:48,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:48,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688485492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:48,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:48,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-24 23:53:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370401641] [2023-11-24 23:53:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:48,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:53:48,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:53:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:53:48,700 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:53:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:49,332 INFO L93 Difference]: Finished difference Result 6884 states and 10753 transitions. [2023-11-24 23:53:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:53:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2023-11-24 23:53:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:49,360 INFO L225 Difference]: With dead ends: 6884 [2023-11-24 23:53:49,360 INFO L226 Difference]: Without dead ends: 3337 [2023-11-24 23:53:49,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:49,383 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 479 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:49,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1676 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:53:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2023-11-24 23:53:49,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 3319. [2023-11-24 23:53:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2365 states have (on average 1.4858350951374206) internal successors, (3514), 2494 states have internal predecessors, (3514), 739 states have call successors, (739), 204 states have call predecessors, (739), 214 states have return successors, (909), 716 states have call predecessors, (909), 734 states have call successors, (909) [2023-11-24 23:53:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 5162 transitions. [2023-11-24 23:53:49,689 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 5162 transitions. Word has length 76 [2023-11-24 23:53:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:49,690 INFO L495 AbstractCegarLoop]: Abstraction has 3319 states and 5162 transitions. [2023-11-24 23:53:49,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:53:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 5162 transitions. [2023-11-24 23:53:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-24 23:53:49,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:49,694 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] [2023-11-24 23:53:49,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:49,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 23:53:49,902 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:49,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1008686334, now seen corresponding path program 1 times [2023-11-24 23:53:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:49,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110479788] [2023-11-24 23:53:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:53:50,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:50,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110479788] [2023-11-24 23:53:50,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110479788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:50,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795549870] [2023-11-24 23:53:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:50,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:50,227 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:50,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:53:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:50,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:53:50,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:53:50,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795549870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:50,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 23:53:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440783672] [2023-11-24 23:53:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:53:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:53:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:50,660 INFO L87 Difference]: Start difference. First operand 3319 states and 5162 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-24 23:53:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:51,080 INFO L93 Difference]: Finished difference Result 7477 states and 11734 transitions. [2023-11-24 23:53:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:53:51,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-11-24 23:53:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:51,123 INFO L225 Difference]: With dead ends: 7477 [2023-11-24 23:53:51,123 INFO L226 Difference]: Without dead ends: 4170 [2023-11-24 23:53:51,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:53:51,148 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 527 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:51,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1168 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:53:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2023-11-24 23:53:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3284. [2023-11-24 23:53:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2341 states have (on average 1.482699700982486) internal successors, (3471), 2470 states have internal predecessors, (3471), 732 states have call successors, (732), 201 states have call predecessors, (732), 210 states have return successors, (887), 708 states have call predecessors, (887), 727 states have call successors, (887) [2023-11-24 23:53:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5090 transitions. [2023-11-24 23:53:51,490 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5090 transitions. Word has length 75 [2023-11-24 23:53:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:51,491 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 5090 transitions. [2023-11-24 23:53:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-24 23:53:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5090 transitions. [2023-11-24 23:53:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-24 23:53:51,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:51,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:51,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:51,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 23:53:51,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:51,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash 113427313, now seen corresponding path program 1 times [2023-11-24 23:53:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:51,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152874475] [2023-11-24 23:53:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:53:52,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:52,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152874475] [2023-11-24 23:53:52,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152874475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:52,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730553147] [2023-11-24 23:53:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:52,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:52,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:52,077 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:52,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 23:53:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:52,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:53:52,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:53:52,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:52,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730553147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:52,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:52,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-24 23:53:52,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553398503] [2023-11-24 23:53:52,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:52,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:53:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:53:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:52,583 INFO L87 Difference]: Start difference. First operand 3284 states and 5090 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-24 23:53:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:53,424 INFO L93 Difference]: Finished difference Result 5996 states and 9318 transitions. [2023-11-24 23:53:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:53:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2023-11-24 23:53:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:53,452 INFO L225 Difference]: With dead ends: 5996 [2023-11-24 23:53:53,452 INFO L226 Difference]: Without dead ends: 3305 [2023-11-24 23:53:53,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:53:53,463 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 414 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:53,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2361 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:53:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2023-11-24 23:53:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3288. [2023-11-24 23:53:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 2341 states have (on average 1.482699700982486) internal successors, (3471), 2474 states have internal predecessors, (3471), 736 states have call successors, (736), 201 states have call predecessors, (736), 210 states have return successors, (891), 708 states have call predecessors, (891), 731 states have call successors, (891) [2023-11-24 23:53:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 5098 transitions. [2023-11-24 23:53:53,726 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 5098 transitions. Word has length 79 [2023-11-24 23:53:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:53,726 INFO L495 AbstractCegarLoop]: Abstraction has 3288 states and 5098 transitions. [2023-11-24 23:53:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-24 23:53:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 5098 transitions. [2023-11-24 23:53:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 23:53:53,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:53,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:53,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:53,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:53:53,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:53,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 436930049, now seen corresponding path program 1 times [2023-11-24 23:53:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:53,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700966266] [2023-11-24 23:53:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 23:53:54,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:54,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700966266] [2023-11-24 23:53:54,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700966266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:54,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753269995] [2023-11-24 23:53:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:54,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:54,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:54,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 23:53:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:54,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:53:54,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:53:54,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:54,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753269995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:54,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:54,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-24 23:53:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378934606] [2023-11-24 23:53:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:54,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:53:54,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:54,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:53:54,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:54,801 INFO L87 Difference]: Start difference. First operand 3288 states and 5098 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-24 23:53:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:55,214 INFO L93 Difference]: Finished difference Result 6257 states and 9837 transitions. [2023-11-24 23:53:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:53:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2023-11-24 23:53:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:55,259 INFO L225 Difference]: With dead ends: 6257 [2023-11-24 23:53:55,259 INFO L226 Difference]: Without dead ends: 3423 [2023-11-24 23:53:55,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:53:55,277 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 13 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:55,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2224 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:53:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2023-11-24 23:53:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 3369. [2023-11-24 23:53:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 2393 states have (on average 1.4730463852904305) internal successors, (3525), 2541 states have internal predecessors, (3525), 743 states have call successors, (743), 201 states have call predecessors, (743), 232 states have return successors, (990), 722 states have call predecessors, (990), 738 states have call successors, (990) [2023-11-24 23:53:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 5258 transitions. [2023-11-24 23:53:55,599 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 5258 transitions. Word has length 99 [2023-11-24 23:53:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:55,600 INFO L495 AbstractCegarLoop]: Abstraction has 3369 states and 5258 transitions. [2023-11-24 23:53:55,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-24 23:53:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 5258 transitions. [2023-11-24 23:53:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-24 23:53:55,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:55,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:55,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 23:53:55,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 23:53:55,821 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:55,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046179, now seen corresponding path program 1 times [2023-11-24 23:53:55,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:55,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619923741] [2023-11-24 23:53:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:55,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-24 23:53:56,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:56,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619923741] [2023-11-24 23:53:56,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619923741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:53:56,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830639649] [2023-11-24 23:53:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:56,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:53:56,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:53:56,214 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:53:56,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 23:53:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:56,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1861 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:53:56,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:53:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:53:56,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:53:56,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830639649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:56,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:53:56,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-24 23:53:56,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831767853] [2023-11-24 23:53:56,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:56,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:53:56,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:56,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:53:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:53:56,785 INFO L87 Difference]: Start difference. First operand 3369 states and 5258 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-24 23:54:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:00,353 INFO L93 Difference]: Finished difference Result 7525 states and 11955 transitions. [2023-11-24 23:54:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 23:54:00,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2023-11-24 23:54:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:00,385 INFO L225 Difference]: With dead ends: 7525 [2023-11-24 23:54:00,385 INFO L226 Difference]: Without dead ends: 4052 [2023-11-24 23:54:00,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-24 23:54:00,400 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1358 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 3178 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 3178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:00,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 1696 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 3178 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-24 23:54:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2023-11-24 23:54:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3450. [2023-11-24 23:54:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 2441 states have (on average 1.4698893895944285) internal successors, (3588), 2594 states have internal predecessors, (3588), 775 states have call successors, (775), 201 states have call predecessors, (775), 233 states have return successors, (1074), 750 states have call predecessors, (1074), 770 states have call successors, (1074) [2023-11-24 23:54:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 5437 transitions. [2023-11-24 23:54:00,709 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 5437 transitions. Word has length 117 [2023-11-24 23:54:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:00,710 INFO L495 AbstractCegarLoop]: Abstraction has 3450 states and 5437 transitions. [2023-11-24 23:54:00,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-24 23:54:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 5437 transitions. [2023-11-24 23:54:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-24 23:54:00,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:00,720 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:54:00,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:54:00,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:00,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash 339696730, now seen corresponding path program 1 times [2023-11-24 23:54:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633390632] [2023-11-24 23:54:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 23:54:01,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:01,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633390632] [2023-11-24 23:54:01,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633390632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:01,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580993045] [2023-11-24 23:54:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:01,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:01,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:01,362 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:01,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 23:54:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:01,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:54:01,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:54:01,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:01,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580993045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:01,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:01,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-24 23:54:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335635721] [2023-11-24 23:54:01,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:01,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:54:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:01,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:54:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:54:01,878 INFO L87 Difference]: Start difference. First operand 3450 states and 5437 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-24 23:54:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:02,387 INFO L93 Difference]: Finished difference Result 8086 states and 12966 transitions. [2023-11-24 23:54:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:54:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2023-11-24 23:54:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:02,425 INFO L225 Difference]: With dead ends: 8086 [2023-11-24 23:54:02,425 INFO L226 Difference]: Without dead ends: 4648 [2023-11-24 23:54:02,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:54:02,443 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 463 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:02,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1264 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:54:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2023-11-24 23:54:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4580. [2023-11-24 23:54:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 3248 states have (on average 1.4713669950738917) internal successors, (4779), 3457 states have internal predecessors, (4779), 1022 states have call successors, (1022), 263 states have call predecessors, (1022), 309 states have return successors, (1419), 991 states have call predecessors, (1419), 1017 states have call successors, (1419) [2023-11-24 23:54:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 7220 transitions. [2023-11-24 23:54:02,884 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 7220 transitions. Word has length 118 [2023-11-24 23:54:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:02,884 INFO L495 AbstractCegarLoop]: Abstraction has 4580 states and 7220 transitions. [2023-11-24 23:54:02,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-24 23:54:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 7220 transitions. [2023-11-24 23:54:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:54:02,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:02,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:54:02,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:03,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 23:54:03,108 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:03,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1235135700, now seen corresponding path program 1 times [2023-11-24 23:54:03,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:03,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930006848] [2023-11-24 23:54:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:03,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-24 23:54:03,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930006848] [2023-11-24 23:54:03,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930006848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:03,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654214847] [2023-11-24 23:54:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:03,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:03,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:03,504 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:03,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 23:54:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:03,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:54:03,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 23:54:03,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:03,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654214847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:03,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:03,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-24 23:54:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952898665] [2023-11-24 23:54:03,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:03,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:54:03,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:03,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:54:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:54:03,971 INFO L87 Difference]: Start difference. First operand 4580 states and 7220 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-24 23:54:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:05,243 INFO L93 Difference]: Finished difference Result 9190 states and 14819 transitions. [2023-11-24 23:54:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:54:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2023-11-24 23:54:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:05,284 INFO L225 Difference]: With dead ends: 9190 [2023-11-24 23:54:05,284 INFO L226 Difference]: Without dead ends: 5473 [2023-11-24 23:54:05,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:54:05,306 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 578 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:05,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 1309 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:54:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2023-11-24 23:54:05,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 5358. [2023-11-24 23:54:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5358 states, 3696 states have (on average 1.4650974025974026) internal successors, (5415), 3951 states have internal predecessors, (5415), 1285 states have call successors, (1285), 339 states have call predecessors, (1285), 376 states have return successors, (1735), 1247 states have call predecessors, (1735), 1278 states have call successors, (1735) [2023-11-24 23:54:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5358 states to 5358 states and 8435 transitions. [2023-11-24 23:54:05,867 INFO L78 Accepts]: Start accepts. Automaton has 5358 states and 8435 transitions. Word has length 123 [2023-11-24 23:54:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:05,868 INFO L495 AbstractCegarLoop]: Abstraction has 5358 states and 8435 transitions. [2023-11-24 23:54:05,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-24 23:54:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5358 states and 8435 transitions. [2023-11-24 23:54:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 23:54:05,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:05,881 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:54:05,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:06,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 23:54:06,090 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:06,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash -366856417, now seen corresponding path program 1 times [2023-11-24 23:54:06,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:06,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924090392] [2023-11-24 23:54:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:06,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-24 23:54:06,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:06,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924090392] [2023-11-24 23:54:06,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924090392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:06,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685115071] [2023-11-24 23:54:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:06,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:06,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:06,488 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:06,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69c487cc-b46e-4dfa-9d92-f4219b8f951f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 23:54:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:06,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:54:06,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 23:54:06,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:06,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685115071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:06,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:06,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-24 23:54:06,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820459398] [2023-11-24 23:54:06,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:06,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:54:06,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:54:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:54:06,961 INFO L87 Difference]: Start difference. First operand 5358 states and 8435 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-24 23:54:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:08,402 INFO L93 Difference]: Finished difference Result 12862 states and 20676 transitions. [2023-11-24 23:54:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:54:08,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2023-11-24 23:54:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:08,461 INFO L225 Difference]: With dead ends: 12862 [2023-11-24 23:54:08,462 INFO L226 Difference]: Without dead ends: 8345 [2023-11-24 23:54:08,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:54:08,493 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 524 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:08,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1981 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:54:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states.