./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:53:10,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:53:10,505 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:53:10,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:53:10,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:53:10,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:53:10,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:53:10,557 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:53:10,558 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:53:10,563 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:53:10,563 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:53:10,564 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:53:10,564 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:53:10,566 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:53:10,567 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:53:10,567 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:53:10,567 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:53:10,568 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:53:10,569 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:53:10,570 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:53:10,570 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:53:10,571 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:53:10,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:53:10,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:53:10,573 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:53:10,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:53:10,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:53:10,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:53:10,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:53:10,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:53:10,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:53:10,577 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:53:10,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:53:10,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:53:10,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:53:10,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:53:10,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:10,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:53:10,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:53:10,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:53:10,579 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:53:10,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:53:10,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:53:10,580 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:53:10,580 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:53:10,581 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_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2023-11-12 00:53:10,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:53:10,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:53:10,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:53:10,930 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:53:10,931 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:53:10,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2023-11-12 00:53:14,120 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:53:14,579 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:53:14,580 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2023-11-12 00:53:14,608 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/data/6e76db043/2431df1c888e4eb685872cdf1246a016/FLAGd319e2165 [2023-11-12 00:53:14,625 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/data/6e76db043/2431df1c888e4eb685872cdf1246a016 [2023-11-12 00:53:14,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:53:14,633 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:53:14,636 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:14,636 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:53:14,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:53:14,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:14" (1/1) ... [2023-11-12 00:53:14,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24cf1814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:14, skipping insertion in model container [2023-11-12 00:53:14,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:14" (1/1) ... [2023-11-12 00:53:14,734 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:53:15,210 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_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2023-11-12 00:53:15,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:15,413 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:53:15,426 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2023-11-12 00:53:15,428 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [86] [2023-11-12 00:53:15,428 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [452] [2023-11-12 00:53:15,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1120] [2023-11-12 00:53:15,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1476] [2023-11-12 00:53:15,430 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1485] [2023-11-12 00:53:15,430 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2984] [2023-11-12 00:53:15,431 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [3102] [2023-11-12 00:53:15,431 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3288] [2023-11-12 00:53:15,432 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3303] [2023-11-12 00:53:15,515 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_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2023-11-12 00:53:15,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:15,601 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:53:15,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15 WrapperNode [2023-11-12 00:53:15,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:15,603 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:15,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:53:15,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:53:15,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,696 INFO L138 Inliner]: procedures = 90, calls = 344, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 818 [2023-11-12 00:53:15,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:15,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:53:15,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:53:15,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:53:15,709 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,742 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,762 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:53:15,779 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:53:15,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:53:15,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:53:15,780 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (1/1) ... [2023-11-12 00:53:15,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:15,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:15,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:53:15,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:53:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:53:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-12 00:53:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-12 00:53:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 00:53:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 00:53:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 00:53:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 00:53:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 00:53:15,883 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 00:53:15,883 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-12 00:53:15,884 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-12 00:53:15,884 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 00:53:15,884 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 00:53:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 00:53:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 00:53:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 00:53:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 00:53:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 00:53:15,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 00:53:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 00:53:15,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 00:53:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 00:53:15,890 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 00:53:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 00:53:15,890 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 00:53:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-12 00:53:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-12 00:53:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 00:53:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 00:53:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 00:53:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 00:53:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-12 00:53:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-12 00:53:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 00:53:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 00:53:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 00:53:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 00:53:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 00:53:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 00:53:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:53:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-11-12 00:53:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-11-12 00:53:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-12 00:53:15,894 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-12 00:53:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 00:53:15,894 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 00:53:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 00:53:15,895 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 00:53:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 00:53:15,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 00:53:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:53:15,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:53:15,897 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 00:53:15,897 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 00:53:16,101 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:53:16,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:53:17,661 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:53:18,662 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:53:18,662 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:53:18,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:53:18 BoogieIcfgContainer [2023-11-12 00:53:18,669 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:53:18,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:53:18,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:53:18,678 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:53:18,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:53:14" (1/3) ... [2023-11-12 00:53:18,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e43d786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:53:18, skipping insertion in model container [2023-11-12 00:53:18,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:15" (2/3) ... [2023-11-12 00:53:18,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e43d786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:53:18, skipping insertion in model container [2023-11-12 00:53:18,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:53:18" (3/3) ... [2023-11-12 00:53:18,683 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2023-11-12 00:53:18,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:53:18,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:53:18,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:53:18,809 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;@6dd1bd2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:53:18,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:53:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-12 00:53:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:53:18,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:18,840 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] [2023-11-12 00:53:18,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:18,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1214067173, now seen corresponding path program 1 times [2023-11-12 00:53:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:18,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138120610] [2023-11-12 00:53:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:53:19,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:19,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138120610] [2023-11-12 00:53:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138120610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652480237] [2023-11-12 00:53:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:19,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:19,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:19,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:53:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:20,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:53:20,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:20,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:53:20,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652480237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:20,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:53:20,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:53:20,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6034466] [2023-11-12 00:53:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:53:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:20,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:53:20,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:53:20,290 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) 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, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:53:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:20,742 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2023-11-12 00:53:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:53:20,745 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, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-11-12 00:53:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:20,779 INFO L225 Difference]: With dead ends: 1095 [2023-11-12 00:53:20,779 INFO L226 Difference]: Without dead ends: 707 [2023-11-12 00:53:20,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:53:20,791 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 584 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:20,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 1071 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:53:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2023-11-12 00:53:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2023-11-12 00:53:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2023-11-12 00:53:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2023-11-12 00:53:20,921 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2023-11-12 00:53:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:20,923 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2023-11-12 00:53:20,923 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, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:53:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2023-11-12 00:53:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 00:53:20,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:20,935 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] [2023-11-12 00:53:20,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:53:21,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:21,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:21,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash -444681761, now seen corresponding path program 1 times [2023-11-12 00:53:21,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:21,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23504274] [2023-11-12 00:53:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:21,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:53:21,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:21,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23504274] [2023-11-12 00:53:21,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23504274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:21,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:21,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:53:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243905843] [2023-11-12 00:53:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:21,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:53:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:53:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:53:21,668 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:53:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:22,051 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2023-11-12 00:53:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:53:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2023-11-12 00:53:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:22,077 INFO L225 Difference]: With dead ends: 2057 [2023-11-12 00:53:22,077 INFO L226 Difference]: Without dead ends: 1374 [2023-11-12 00:53:22,082 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 [2023-11-12 00:53:22,084 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 576 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:22,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1177 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:53:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2023-11-12 00:53:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2023-11-12 00:53:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2023-11-12 00:53:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2023-11-12 00:53:22,232 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2023-11-12 00:53:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:22,233 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2023-11-12 00:53:22,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:53:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2023-11-12 00:53:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:53:22,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:22,242 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:22,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:53:22,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:22,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash -676803988, now seen corresponding path program 1 times [2023-11-12 00:53:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:22,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31643013] [2023-11-12 00:53:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:22,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:53:22,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:22,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31643013] [2023-11-12 00:53:22,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31643013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:22,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:22,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:53:22,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125381429] [2023-11-12 00:53:22,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:22,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:53:22,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:22,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:53:22,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:53:22,651 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 00:53:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:22,981 INFO L93 Difference]: Finished difference Result 2993 states and 4835 transitions. [2023-11-12 00:53:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:53:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2023-11-12 00:53:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:22,999 INFO L225 Difference]: With dead ends: 2993 [2023-11-12 00:53:22,999 INFO L226 Difference]: Without dead ends: 1715 [2023-11-12 00:53:23,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:53:23,015 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 435 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:23,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1548 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:53:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2023-11-12 00:53:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1673. [2023-11-12 00:53:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1167 states have (on average 1.5569837189374465) internal successors, (1817), 1221 states have internal predecessors, (1817), 394 states have call successors, (394), 104 states have call predecessors, (394), 111 states have return successors, (472), 375 states have call predecessors, (472), 388 states have call successors, (472) [2023-11-12 00:53:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2683 transitions. [2023-11-12 00:53:23,216 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2683 transitions. Word has length 69 [2023-11-12 00:53:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:23,218 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2683 transitions. [2023-11-12 00:53:23,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 00:53:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2683 transitions. [2023-11-12 00:53:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:53:23,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:23,226 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:23,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:53:23,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:23,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1828789905, now seen corresponding path program 1 times [2023-11-12 00:53:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:23,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944541898] [2023-11-12 00:53:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:53:23,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944541898] [2023-11-12 00:53:23,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944541898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:23,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:53:23,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:53:23,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47645991] [2023-11-12 00:53:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:23,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:53:23,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:53:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:53:23,824 INFO L87 Difference]: Start difference. First operand 1673 states and 2683 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 00:53:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:24,917 INFO L93 Difference]: Finished difference Result 4228 states and 6953 transitions. [2023-11-12 00:53:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:53:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2023-11-12 00:53:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:24,949 INFO L225 Difference]: With dead ends: 4228 [2023-11-12 00:53:24,950 INFO L226 Difference]: Without dead ends: 2567 [2023-11-12 00:53:24,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:53:24,966 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 603 mSDsluCounter, 2277 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:24,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 2918 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:53:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2023-11-12 00:53:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2429. [2023-11-12 00:53:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1700 states have (on average 1.5488235294117647) internal successors, (2633), 1786 states have internal predecessors, (2633), 564 states have call successors, (564), 153 states have call predecessors, (564), 164 states have return successors, (735), 533 states have call predecessors, (735), 556 states have call successors, (735) [2023-11-12 00:53:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3932 transitions. [2023-11-12 00:53:25,180 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3932 transitions. Word has length 70 [2023-11-12 00:53:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:25,181 INFO L495 AbstractCegarLoop]: Abstraction has 2429 states and 3932 transitions. [2023-11-12 00:53:25,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 00:53:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3932 transitions. [2023-11-12 00:53:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:53:25,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:25,186 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:25,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:53:25,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:25,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash 746033987, now seen corresponding path program 1 times [2023-11-12 00:53:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:25,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672825405] [2023-11-12 00:53:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:25,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:53:25,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672825405] [2023-11-12 00:53:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672825405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765339238] [2023-11-12 00:53:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:25,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:25,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:25,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:25,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:53:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:25,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:53:25,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:26,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:53:26,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765339238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:26,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:53:26,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:53:26,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474198597] [2023-11-12 00:53:26,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:26,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:53:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:53:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:53:26,037 INFO L87 Difference]: Start difference. First operand 2429 states and 3932 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:53:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:26,410 INFO L93 Difference]: Finished difference Result 5961 states and 9966 transitions. [2023-11-12 00:53:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:53:26,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2023-11-12 00:53:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:26,452 INFO L225 Difference]: With dead ends: 5961 [2023-11-12 00:53:26,452 INFO L226 Difference]: Without dead ends: 3544 [2023-11-12 00:53:26,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:53:26,479 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 551 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:26,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1057 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:53:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2023-11-12 00:53:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3399. [2023-11-12 00:53:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2393 states have (on average 1.5436690346844963) internal successors, (3694), 2523 states have internal predecessors, (3694), 772 states have call successors, (772), 210 states have call predecessors, (772), 233 states have return successors, (1044), 731 states have call predecessors, (1044), 764 states have call successors, (1044) [2023-11-12 00:53:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5510 transitions. [2023-11-12 00:53:26,816 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5510 transitions. Word has length 70 [2023-11-12 00:53:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:26,817 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5510 transitions. [2023-11-12 00:53:26,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:53:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5510 transitions. [2023-11-12 00:53:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 00:53:26,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:26,823 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:26,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:53:27,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:27,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:27,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1620556643, now seen corresponding path program 1 times [2023-11-12 00:53:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:27,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677150547] [2023-11-12 00:53:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:53:27,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:27,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677150547] [2023-11-12 00:53:27,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677150547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:27,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538723422] [2023-11-12 00:53:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:27,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:27,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:27,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:27,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:53:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:27,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:53:27,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:53:27,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:53:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538723422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:27,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:53:27,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-12 00:53:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743764964] [2023-11-12 00:53:27,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:27,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:53:27,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:53:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:53:27,936 INFO L87 Difference]: Start difference. First operand 3399 states and 5510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 00:53:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:28,720 INFO L93 Difference]: Finished difference Result 8598 states and 14203 transitions. [2023-11-12 00:53:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:53:28,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2023-11-12 00:53:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:28,772 INFO L225 Difference]: With dead ends: 8598 [2023-11-12 00:53:28,772 INFO L226 Difference]: Without dead ends: 5211 [2023-11-12 00:53:28,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:53:28,808 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 489 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:28,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 1661 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:53:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2023-11-12 00:53:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 5160. [2023-11-12 00:53:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5160 states, 3634 states have (on average 1.507705008255366) internal successors, (5479), 3848 states have internal predecessors, (5479), 1175 states have call successors, (1175), 336 states have call predecessors, (1175), 350 states have return successors, (1524), 1081 states have call predecessors, (1524), 1164 states have call successors, (1524) [2023-11-12 00:53:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 8178 transitions. [2023-11-12 00:53:29,337 INFO L78 Accepts]: Start accepts. Automaton has 5160 states and 8178 transitions. Word has length 71 [2023-11-12 00:53:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:29,337 INFO L495 AbstractCegarLoop]: Abstraction has 5160 states and 8178 transitions. [2023-11-12 00:53:29,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 00:53:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5160 states and 8178 transitions. [2023-11-12 00:53:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-12 00:53:29,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:29,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:29,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:53:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:29,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:29,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash -602728237, now seen corresponding path program 1 times [2023-11-12 00:53:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:29,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944792931] [2023-11-12 00:53:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:29,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:53:30,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:30,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944792931] [2023-11-12 00:53:30,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944792931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:30,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661930685] [2023-11-12 00:53:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:30,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:30,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:30,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:30,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:53:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:30,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:53:30,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:53:30,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:53:30,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661930685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:30,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:53:30,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-12 00:53:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868093803] [2023-11-12 00:53:30,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:30,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:53:30,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:53:30,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:53:30,893 INFO L87 Difference]: Start difference. First operand 5160 states and 8178 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:53:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:31,646 INFO L93 Difference]: Finished difference Result 10206 states and 16530 transitions. [2023-11-12 00:53:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:53:31,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2023-11-12 00:53:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:31,709 INFO L225 Difference]: With dead ends: 10206 [2023-11-12 00:53:31,709 INFO L226 Difference]: Without dead ends: 6225 [2023-11-12 00:53:31,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:53:31,742 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 117 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:31,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1709 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:53:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6225 states. [2023-11-12 00:53:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6225 to 5190. [2023-11-12 00:53:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5190 states, 3664 states have (on average 1.5035480349344978) internal successors, (5509), 3878 states have internal predecessors, (5509), 1175 states have call successors, (1175), 336 states have call predecessors, (1175), 350 states have return successors, (1524), 1081 states have call predecessors, (1524), 1164 states have call successors, (1524) [2023-11-12 00:53:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 8208 transitions. [2023-11-12 00:53:32,340 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 8208 transitions. Word has length 80 [2023-11-12 00:53:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:32,341 INFO L495 AbstractCegarLoop]: Abstraction has 5190 states and 8208 transitions. [2023-11-12 00:53:32,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:53:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 8208 transitions. [2023-11-12 00:53:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-12 00:53:32,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:32,352 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:32,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:53:32,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:32,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:32,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1203869967, now seen corresponding path program 1 times [2023-11-12 00:53:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:32,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985861480] [2023-11-12 00:53:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:32,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:53:33,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985861480] [2023-11-12 00:53:33,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985861480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669425732] [2023-11-12 00:53:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:33,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:33,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:33,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:53:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:34,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:53:34,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:53:34,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:53:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:53:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669425732] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:34,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:53:34,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2023-11-12 00:53:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869664496] [2023-11-12 00:53:34,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:34,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:53:34,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:53:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:53:34,668 INFO L87 Difference]: Start difference. First operand 5190 states and 8208 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-12 00:53:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:37,375 INFO L93 Difference]: Finished difference Result 10748 states and 17175 transitions. [2023-11-12 00:53:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:53:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2023-11-12 00:53:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:37,446 INFO L225 Difference]: With dead ends: 10748 [2023-11-12 00:53:37,446 INFO L226 Difference]: Without dead ends: 6755 [2023-11-12 00:53:37,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:53:37,527 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1351 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:37,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1911 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 00:53:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2023-11-12 00:53:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 5864. [2023-11-12 00:53:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5864 states, 4149 states have (on average 1.4851771511207519) internal successors, (6162), 4406 states have internal predecessors, (6162), 1306 states have call successors, (1306), 360 states have call predecessors, (1306), 408 states have return successors, (1797), 1200 states have call predecessors, (1797), 1295 states have call successors, (1797) [2023-11-12 00:53:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 9265 transitions. [2023-11-12 00:53:38,199 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 9265 transitions. Word has length 84 [2023-11-12 00:53:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:38,200 INFO L495 AbstractCegarLoop]: Abstraction has 5864 states and 9265 transitions. [2023-11-12 00:53:38,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-12 00:53:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 9265 transitions. [2023-11-12 00:53:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 00:53:38,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:38,204 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:38,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:53:38,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:38,413 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:38,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1229501915, now seen corresponding path program 1 times [2023-11-12 00:53:38,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:38,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727815742] [2023-11-12 00:53:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:38,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:53:39,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727815742] [2023-11-12 00:53:39,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727815742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504925433] [2023-11-12 00:53:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:39,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:39,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:39,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:39,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:53:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:39,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 00:53:39,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:53:39,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:53:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:53:40,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504925433] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:40,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:53:40,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2023-11-12 00:53:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563468819] [2023-11-12 00:53:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:40,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 00:53:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 00:53:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:53:40,387 INFO L87 Difference]: Start difference. First operand 5864 states and 9265 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:53:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:45,488 INFO L93 Difference]: Finished difference Result 17084 states and 29364 transitions. [2023-11-12 00:53:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:53:45,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2023-11-12 00:53:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:45,602 INFO L225 Difference]: With dead ends: 17084 [2023-11-12 00:53:45,602 INFO L226 Difference]: Without dead ends: 12855 [2023-11-12 00:53:45,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:53:45,642 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 3038 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 1400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3127 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 3594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1400 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:45,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3127 Valid, 2822 Invalid, 3594 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1400 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-12 00:53:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12855 states. [2023-11-12 00:53:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12855 to 11265. [2023-11-12 00:53:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11265 states, 8099 states have (on average 1.4930238301024819) internal successors, (12092), 8542 states have internal predecessors, (12092), 2354 states have call successors, (2354), 681 states have call predecessors, (2354), 811 states have return successors, (4065), 2201 states have call predecessors, (4065), 2337 states have call successors, (4065) [2023-11-12 00:53:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11265 states to 11265 states and 18511 transitions. [2023-11-12 00:53:46,987 INFO L78 Accepts]: Start accepts. Automaton has 11265 states and 18511 transitions. Word has length 87 [2023-11-12 00:53:46,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:46,988 INFO L495 AbstractCegarLoop]: Abstraction has 11265 states and 18511 transitions. [2023-11-12 00:53:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:53:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11265 states and 18511 transitions. [2023-11-12 00:53:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-12 00:53:46,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:46,995 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:47,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:53:47,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:47,204 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:47,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -162001538, now seen corresponding path program 1 times [2023-11-12 00:53:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114272300] [2023-11-12 00:53:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:53:47,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:47,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114272300] [2023-11-12 00:53:47,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114272300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:47,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897198511] [2023-11-12 00:53:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:47,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:47,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:47,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:47,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:53:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:48,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:53:48,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:53:48,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:53:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:53:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897198511] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:48,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:53:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2023-11-12 00:53:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370497304] [2023-11-12 00:53:48,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:48,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:53:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:53:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:53:48,779 INFO L87 Difference]: Start difference. First operand 11265 states and 18511 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 00:53:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:51,376 INFO L93 Difference]: Finished difference Result 22458 states and 37495 transitions. [2023-11-12 00:53:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:53:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2023-11-12 00:53:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:51,479 INFO L225 Difference]: With dead ends: 22458 [2023-11-12 00:53:51,479 INFO L226 Difference]: Without dead ends: 12828 [2023-11-12 00:53:51,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:53:51,655 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 1197 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:51,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 1643 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 00:53:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12828 states. [2023-11-12 00:53:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12828 to 11265. [2023-11-12 00:53:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11265 states, 8099 states have (on average 1.4930238301024819) internal successors, (12092), 8542 states have internal predecessors, (12092), 2354 states have call successors, (2354), 681 states have call predecessors, (2354), 811 states have return successors, (4053), 2201 states have call predecessors, (4053), 2337 states have call successors, (4053) [2023-11-12 00:53:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11265 states to 11265 states and 18499 transitions. [2023-11-12 00:53:52,958 INFO L78 Accepts]: Start accepts. Automaton has 11265 states and 18499 transitions. Word has length 91 [2023-11-12 00:53:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:53:52,958 INFO L495 AbstractCegarLoop]: Abstraction has 11265 states and 18499 transitions. [2023-11-12 00:53:52,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-12 00:53:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 11265 states and 18499 transitions. [2023-11-12 00:53:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 00:53:52,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:53:52,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:53:53,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:53:53,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:53:53,286 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:53:53,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:53:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1712840433, now seen corresponding path program 1 times [2023-11-12 00:53:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:53:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663426645] [2023-11-12 00:53:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:53:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:53:53,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:53:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663426645] [2023-11-12 00:53:53,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663426645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:53:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463997088] [2023-11-12 00:53:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:53:53,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:53:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:53,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:53:53,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26486cec-7c5b-4da7-bfd8-bebd47e49fcf/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:53:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:53:54,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 1865 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:53:54,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:53:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:53:54,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:53:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463997088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:53:54,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:53:54,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-12 00:53:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017381138] [2023-11-12 00:53:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:53:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:53:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:53:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:53:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:53:54,427 INFO L87 Difference]: Start difference. First operand 11265 states and 18499 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:53:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:53:55,370 INFO L93 Difference]: Finished difference Result 21690 states and 36853 transitions. [2023-11-12 00:53:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:53:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2023-11-12 00:53:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:53:55,439 INFO L225 Difference]: With dead ends: 21690 [2023-11-12 00:53:55,439 INFO L226 Difference]: Without dead ends: 11640 [2023-11-12 00:53:55,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:53:55,494 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 2 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:53:55,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2261 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:53:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states.