./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ --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 d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:23:56,439 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:23:56,506 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:23:56,511 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:23:56,512 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:23:56,539 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:23:56,539 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:23:56,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:23:56,541 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:23:56,541 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:23:56,542 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:23:56,542 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:23:56,543 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:23:56,543 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:23:56,544 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:23:56,544 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:23:56,545 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:23:56,545 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:23:56,546 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:23:56,547 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:23:56,547 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:23:56,548 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:23:56,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:23:56,549 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:23:56,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:23:56,550 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:23:56,550 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:23:56,551 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:23:56,551 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:23:56,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:23:56,552 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:23:56,552 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:23:56,553 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:23:56,553 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:23:56,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:23:56,554 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:23:56,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:23:56,555 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:23:56,555 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:23:56,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:23:56,556 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:23:56,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:23:56,557 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:23:56,558 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:23:56,558 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:23:56,558 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_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2023-11-19 05:23:56,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:23:56,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:23:56,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:23:56,915 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:23:56,915 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:23:56,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2023-11-19 05:24:00,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:24:01,058 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:24:01,058 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2023-11-19 05:24:01,089 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/data/f09a4223c/da6ee0103afd4ed3a8ca3fdfa4c183be/FLAG33b024828 [2023-11-19 05:24:01,106 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/data/f09a4223c/da6ee0103afd4ed3a8ca3fdfa4c183be [2023-11-19 05:24:01,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:24:01,111 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:24:01,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:01,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:24:01,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:24:01,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:01" (1/1) ... [2023-11-19 05:24:01,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebeb9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:01, skipping insertion in model container [2023-11-19 05:24:01,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:01" (1/1) ... [2023-11-19 05:24:01,213 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:24:01,572 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_4b484ced-7422-4cc5-8c88-5e9884e091d1/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2023-11-19 05:24:02,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:02,100 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:24:02,113 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2023-11-19 05:24:02,115 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [151] [2023-11-19 05:24:02,116 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [160] [2023-11-19 05:24:02,116 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [198] [2023-11-19 05:24:02,116 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [564] [2023-11-19 05:24:02,117 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [753] [2023-11-19 05:24:02,117 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [873] [2023-11-19 05:24:02,117 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1540] [2023-11-19 05:24:02,118 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1558] [2023-11-19 05:24:02,118 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1907] [2023-11-19 05:24:02,126 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_4b484ced-7422-4cc5-8c88-5e9884e091d1/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2023-11-19 05:24:02,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:24:02,296 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:24:02,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02 WrapperNode [2023-11-19 05:24:02,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:24:02,298 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:02,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:24:02,299 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:24:02,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,462 INFO L138 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1009 [2023-11-19 05:24:02,462 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:24:02,463 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:24:02,463 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:24:02,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:24:02,475 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,485 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,559 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,574 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:24:02,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:24:02,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:24:02,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:24:02,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (1/1) ... [2023-11-19 05:24:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:24:02,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:02,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:24:02,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:24:02,699 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-19 05:24:02,699 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-19 05:24:02,699 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:24:02,699 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:24:02,700 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:24:02,700 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:24:02,700 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:24:02,701 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:24:02,702 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:24:02,702 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:24:02,702 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:24:02,702 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:24:02,703 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:24:02,703 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:24:02,704 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:24:02,705 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:24:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:24:02,705 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:24:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:24:02,708 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:24:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:24:02,708 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:24:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:24:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:24:02,709 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:24:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:24:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:24:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 05:24:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 05:24:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 05:24:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 05:24:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:24:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:24:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:24:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:24:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:24:02,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:24:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:24:02,712 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:24:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-19 05:24:02,712 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-19 05:24:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:24:02,713 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:24:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-19 05:24:02,713 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-19 05:24:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:24:02,714 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:24:02,714 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:24:02,714 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:24:02,714 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:24:02,715 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:24:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:24:02,716 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:24:02,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:24:02,717 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:24:02,717 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:24:02,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:24:02,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:24:02,717 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:24:02,718 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:24:02,718 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-19 05:24:02,718 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-19 05:24:02,961 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:24:02,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:24:04,762 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:24:05,876 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:24:05,876 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:24:05,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:05 BoogieIcfgContainer [2023-11-19 05:24:05,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:24:05,898 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:24:05,898 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:24:05,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:24:05,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:01" (1/3) ... [2023-11-19 05:24:05,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e1632d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:05, skipping insertion in model container [2023-11-19 05:24:05,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:02" (2/3) ... [2023-11-19 05:24:05,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e1632d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:05, skipping insertion in model container [2023-11-19 05:24:05,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:05" (3/3) ... [2023-11-19 05:24:05,909 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2023-11-19 05:24:05,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:24:05,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:24:06,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:24:06,049 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;@342d9f2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:24:06,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:24:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-19 05:24:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 05:24:06,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:06,081 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] [2023-11-19 05:24:06,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:06,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash -230513500, now seen corresponding path program 1 times [2023-11-19 05:24:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:06,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653971695] [2023-11-19 05:24:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:06,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:24:07,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653971695] [2023-11-19 05:24:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653971695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700068125] [2023-11-19 05:24:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:07,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:07,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:07,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:07,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:24:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:07,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:24:07,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:07,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700068125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:07,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:07,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:24:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678011954] [2023-11-19 05:24:07,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:07,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:07,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:07,865 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-19 05:24:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:08,323 INFO L93 Difference]: Finished difference Result 1225 states and 1938 transitions. [2023-11-19 05:24:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2023-11-19 05:24:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:08,367 INFO L225 Difference]: With dead ends: 1225 [2023-11-19 05:24:08,367 INFO L226 Difference]: Without dead ends: 793 [2023-11-19 05:24:08,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:08,388 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 576 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:08,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1297 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-11-19 05:24:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2023-11-19 05:24:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 523 states have (on average 1.5468451242829828) internal successors, (809), 558 states have internal predecessors, (809), 205 states have call successors, (205), 53 states have call predecessors, (205), 52 states have return successors, (207), 197 states have call predecessors, (207), 202 states have call successors, (207) [2023-11-19 05:24:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1221 transitions. [2023-11-19 05:24:08,623 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1221 transitions. Word has length 50 [2023-11-19 05:24:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:08,625 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1221 transitions. [2023-11-19 05:24:08,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-19 05:24:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1221 transitions. [2023-11-19 05:24:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:24:08,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:08,644 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] [2023-11-19 05:24:08,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:08,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 05:24:08,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:08,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash 399834051, now seen corresponding path program 1 times [2023-11-19 05:24:08,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:08,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812363173] [2023-11-19 05:24:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:08,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:24:09,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:09,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812363173] [2023-11-19 05:24:09,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812363173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:09,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164399012] [2023-11-19 05:24:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:09,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:09,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:09,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:09,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:24:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:09,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:24:09,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:09,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:09,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164399012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:09,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:09,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:24:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213180313] [2023-11-19 05:24:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:09,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:09,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:09,986 INFO L87 Difference]: Start difference. First operand 781 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:24:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:10,292 INFO L93 Difference]: Finished difference Result 1915 states and 3024 transitions. [2023-11-19 05:24:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2023-11-19 05:24:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:10,310 INFO L225 Difference]: With dead ends: 1915 [2023-11-19 05:24:10,311 INFO L226 Difference]: Without dead ends: 1146 [2023-11-19 05:24:10,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:10,319 INFO L413 NwaCegarLoop]: 1060 mSDtfsCounter, 631 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:10,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1596 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:24:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2023-11-19 05:24:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1122. [2023-11-19 05:24:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 755 states have (on average 1.5536423841059603) internal successors, (1173), 807 states have internal predecessors, (1173), 292 states have call successors, (292), 74 states have call predecessors, (292), 74 states have return successors, (299), 282 states have call predecessors, (299), 289 states have call successors, (299) [2023-11-19 05:24:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1764 transitions. [2023-11-19 05:24:10,447 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1764 transitions. Word has length 49 [2023-11-19 05:24:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:10,448 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1764 transitions. [2023-11-19 05:24:10,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:24:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1764 transitions. [2023-11-19 05:24:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 05:24:10,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:10,452 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] [2023-11-19 05:24:10,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:10,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:10,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:10,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1470437176, now seen corresponding path program 1 times [2023-11-19 05:24:10,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:10,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413441147] [2023-11-19 05:24:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:24:11,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:11,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413441147] [2023-11-19 05:24:11,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413441147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:11,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:11,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:24:11,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628858649] [2023-11-19 05:24:11,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:11,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:11,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:11,119 INFO L87 Difference]: Start difference. First operand 1122 states and 1764 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:24:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:11,568 INFO L93 Difference]: Finished difference Result 3336 states and 5296 transitions. [2023-11-19 05:24:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2023-11-19 05:24:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:11,593 INFO L225 Difference]: With dead ends: 3336 [2023-11-19 05:24:11,593 INFO L226 Difference]: Without dead ends: 2226 [2023-11-19 05:24:11,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:11,604 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 633 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:11,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1285 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:24:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-11-19 05:24:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2108. [2023-11-19 05:24:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1461 states have (on average 1.57015742642026) internal successors, (2294), 1542 states have internal predecessors, (2294), 515 states have call successors, (515), 130 states have call predecessors, (515), 131 states have return successors, (550), 480 states have call predecessors, (550), 511 states have call successors, (550) [2023-11-19 05:24:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3359 transitions. [2023-11-19 05:24:11,850 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3359 transitions. Word has length 50 [2023-11-19 05:24:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:11,853 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 3359 transitions. [2023-11-19 05:24:11,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:24:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3359 transitions. [2023-11-19 05:24:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-19 05:24:11,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:11,867 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:11,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:24:11,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:11,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash -381782100, now seen corresponding path program 1 times [2023-11-19 05:24:11,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:11,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472103659] [2023-11-19 05:24:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:24:12,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472103659] [2023-11-19 05:24:12,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472103659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:12,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:12,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:24:12,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175850644] [2023-11-19 05:24:12,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:12,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:12,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:24:12,632 INFO L87 Difference]: Start difference. First operand 2108 states and 3359 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 05:24:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:13,844 INFO L93 Difference]: Finished difference Result 5283 states and 8573 transitions. [2023-11-19 05:24:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:24:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2023-11-19 05:24:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:13,895 INFO L225 Difference]: With dead ends: 5283 [2023-11-19 05:24:13,895 INFO L226 Difference]: Without dead ends: 3187 [2023-11-19 05:24:13,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:24:13,924 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 659 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 3233 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:13,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 3233 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:24:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2023-11-19 05:24:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3090. [2023-11-19 05:24:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 2148 states have (on average 1.564711359404097) internal successors, (3361), 2277 states have internal predecessors, (3361), 747 states have call successors, (747), 192 states have call predecessors, (747), 194 states have return successors, (861), 689 states have call predecessors, (861), 742 states have call successors, (861) [2023-11-19 05:24:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 4969 transitions. [2023-11-19 05:24:14,242 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 4969 transitions. Word has length 94 [2023-11-19 05:24:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:14,243 INFO L495 AbstractCegarLoop]: Abstraction has 3090 states and 4969 transitions. [2023-11-19 05:24:14,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 05:24:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 4969 transitions. [2023-11-19 05:24:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-19 05:24:14,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:14,253 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:14,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:24:14,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:14,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:14,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2086977487, now seen corresponding path program 1 times [2023-11-19 05:24:14,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:14,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021081772] [2023-11-19 05:24:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:14,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:24:14,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021081772] [2023-11-19 05:24:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021081772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:14,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181414376] [2023-11-19 05:24:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:14,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:14,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:14,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:24:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:15,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:24:15,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:24:15,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:15,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181414376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:15,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:15,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-19 05:24:15,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472341729] [2023-11-19 05:24:15,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:15,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:24:15,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:15,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:24:15,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:24:15,356 INFO L87 Difference]: Start difference. First operand 3090 states and 4969 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:24:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:16,723 INFO L93 Difference]: Finished difference Result 8380 states and 13794 transitions. [2023-11-19 05:24:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:24:16,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2023-11-19 05:24:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:16,865 INFO L225 Difference]: With dead ends: 8380 [2023-11-19 05:24:16,865 INFO L226 Difference]: Without dead ends: 5302 [2023-11-19 05:24:16,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:24:16,903 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 561 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:16,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 2737 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:24:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2023-11-19 05:24:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 5259. [2023-11-19 05:24:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 3644 states have (on average 1.5030186608122942) internal successors, (5477), 3862 states have internal predecessors, (5477), 1267 states have call successors, (1267), 351 states have call predecessors, (1267), 347 states have return successors, (1581), 1154 states have call predecessors, (1581), 1259 states have call successors, (1581) [2023-11-19 05:24:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 8325 transitions. [2023-11-19 05:24:17,374 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 8325 transitions. Word has length 95 [2023-11-19 05:24:17,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:17,376 INFO L495 AbstractCegarLoop]: Abstraction has 5259 states and 8325 transitions. [2023-11-19 05:24:17,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 05:24:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 8325 transitions. [2023-11-19 05:24:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-19 05:24:17,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:17,384 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:17,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:17,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:17,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1508142962, now seen corresponding path program 1 times [2023-11-19 05:24:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:17,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875917134] [2023-11-19 05:24:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:24:18,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875917134] [2023-11-19 05:24:18,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875917134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:18,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437776316] [2023-11-19 05:24:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:18,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:18,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:24:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:18,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:24:18,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:24:18,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:18,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437776316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:18,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:18,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:24:18,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028960382] [2023-11-19 05:24:18,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:18,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:18,822 INFO L87 Difference]: Start difference. First operand 5259 states and 8325 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:24:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:19,559 INFO L93 Difference]: Finished difference Result 11698 states and 18620 transitions. [2023-11-19 05:24:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2023-11-19 05:24:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:19,633 INFO L225 Difference]: With dead ends: 11698 [2023-11-19 05:24:19,634 INFO L226 Difference]: Without dead ends: 6451 [2023-11-19 05:24:19,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:24:19,679 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 591 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:19,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1282 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:24:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2023-11-19 05:24:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5173. [2023-11-19 05:24:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5173 states, 3584 states have (on average 1.5027901785714286) internal successors, (5386), 3803 states have internal predecessors, (5386), 1250 states have call successors, (1250), 345 states have call predecessors, (1250), 338 states have return successors, (1520), 1133 states have call predecessors, (1520), 1242 states have call successors, (1520) [2023-11-19 05:24:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5173 states to 5173 states and 8156 transitions. [2023-11-19 05:24:20,202 INFO L78 Accepts]: Start accepts. Automaton has 5173 states and 8156 transitions. Word has length 94 [2023-11-19 05:24:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:20,203 INFO L495 AbstractCegarLoop]: Abstraction has 5173 states and 8156 transitions. [2023-11-19 05:24:20,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:24:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5173 states and 8156 transitions. [2023-11-19 05:24:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-19 05:24:20,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:20,214 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:20,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:24:20,434 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:20,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 815150653, now seen corresponding path program 1 times [2023-11-19 05:24:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370296946] [2023-11-19 05:24:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:24:21,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:21,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370296946] [2023-11-19 05:24:21,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370296946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:21,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328399729] [2023-11-19 05:24:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:21,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:21,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:21,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:24:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:21,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:24:21,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:24:22,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328399729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:22,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:24:22,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2023-11-19 05:24:22,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603380724] [2023-11-19 05:24:22,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:24:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:24:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:24:22,007 INFO L87 Difference]: Start difference. First operand 5173 states and 8156 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:24:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:22,698 INFO L93 Difference]: Finished difference Result 11364 states and 17884 transitions. [2023-11-19 05:24:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:24:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2023-11-19 05:24:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:22,766 INFO L225 Difference]: With dead ends: 11364 [2023-11-19 05:24:22,766 INFO L226 Difference]: Without dead ends: 6203 [2023-11-19 05:24:22,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:24:22,797 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 440 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:22,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1813 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:24:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6203 states. [2023-11-19 05:24:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6203 to 6159. [2023-11-19 05:24:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6159 states, 4237 states have (on average 1.4666037290535756) internal successors, (6214), 4460 states have internal predecessors, (6214), 1457 states have call successors, (1457), 450 states have call predecessors, (1457), 464 states have return successors, (1860), 1354 states have call predecessors, (1860), 1446 states have call successors, (1860) [2023-11-19 05:24:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6159 states to 6159 states and 9531 transitions. [2023-11-19 05:24:23,505 INFO L78 Accepts]: Start accepts. Automaton has 6159 states and 9531 transitions. Word has length 99 [2023-11-19 05:24:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:23,507 INFO L495 AbstractCegarLoop]: Abstraction has 6159 states and 9531 transitions. [2023-11-19 05:24:23,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:24:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6159 states and 9531 transitions. [2023-11-19 05:24:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 05:24:23,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:23,536 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:23,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:23,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:23,737 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:23,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:23,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1114515597, now seen corresponding path program 1 times [2023-11-19 05:24:23,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:23,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687871134] [2023-11-19 05:24:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:23,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:24:24,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:24,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687871134] [2023-11-19 05:24:24,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687871134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:24:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764871607] [2023-11-19 05:24:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:24,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:24,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:24,894 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:24,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b484ced-7422-4cc5-8c88-5e9884e091d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:24:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:25,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 05:24:25,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:24:25,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:24:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:24:26,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764871607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:24:26,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195985874] [2023-11-19 05:24:26,150 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-11-19 05:24:26,150 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:24:26,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:24:26,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:24:26,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs