./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 09db197a4bc835c4357a369c0d6e9c99a50322d20849e0303ed04dd1e516e51b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:18:42,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:18:42,486 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:18:42,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:18:42,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:18:42,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:18:42,520 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:18:42,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:18:42,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:18:42,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:18:42,523 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:18:42,523 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:18:42,524 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:18:42,525 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:18:42,525 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:18:42,526 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:18:42,526 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:18:42,527 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:18:42,528 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:18:42,528 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:18:42,529 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:18:42,530 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:18:42,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:18:42,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:18:42,532 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:18:42,532 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:18:42,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:18:42,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:18:42,534 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:18:42,535 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:18:42,535 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:18:42,536 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:18:42,536 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:18:42,537 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:18:42,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:18:42,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:18:42,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:18:42,539 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:18:42,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:18:42,540 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:18:42,541 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:18:42,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:18:42,541 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:18:42,542 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:18:42,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:18:42,542 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_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09db197a4bc835c4357a369c0d6e9c99a50322d20849e0303ed04dd1e516e51b [2023-11-19 05:18:42,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:18:42,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:18:42,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:18:42,803 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:18:42,804 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:18:42,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2023-11-19 05:18:45,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:18:46,308 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:18:46,310 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2023-11-19 05:18:46,332 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/data/1f541a770/377d54e68868450f91fb7de00f628ada/FLAG7200dd9fe [2023-11-19 05:18:46,351 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/data/1f541a770/377d54e68868450f91fb7de00f628ada [2023-11-19 05:18:46,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:18:46,361 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:18:46,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:18:46,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:18:46,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:18:46,374 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:18:46" (1/1) ... [2023-11-19 05:18:46,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e904ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:46, skipping insertion in model container [2023-11-19 05:18:46,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:18:46" (1/1) ... [2023-11-19 05:18:46,493 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:18:47,175 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_400e6bb0-fc3d-4a02-9eaa-afa248813a57/sv-benchmarks/c/eca-rers2012/Problem03_label17.c[61094,61107] [2023-11-19 05:18:47,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:18:47,224 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:18:47,558 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_400e6bb0-fc3d-4a02-9eaa-afa248813a57/sv-benchmarks/c/eca-rers2012/Problem03_label17.c[61094,61107] [2023-11-19 05:18:47,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:18:47,586 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:18:47,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47 WrapperNode [2023-11-19 05:18:47,587 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:18:47,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:18:47,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:18:47,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:18:47,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,771 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-19 05:18:47,772 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:18:47,773 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:18:47,773 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:18:47,773 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:18:47,784 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,863 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,925 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:18:47,928 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:18:47,928 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:18:47,929 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:18:47,930 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (1/1) ... [2023-11-19 05:18:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:18:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:47,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:18:47,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:18:48,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:18:48,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:18:48,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:18:48,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:18:48,145 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:18:48,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:18:50,232 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:18:50,733 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:18:50,733 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:18:50,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:18:50 BoogieIcfgContainer [2023-11-19 05:18:50,746 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:18:50,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:18:50,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:18:50,752 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:18:50,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:18:46" (1/3) ... [2023-11-19 05:18:50,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f636699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:18:50, skipping insertion in model container [2023-11-19 05:18:50,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:18:47" (2/3) ... [2023-11-19 05:18:50,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f636699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:18:50, skipping insertion in model container [2023-11-19 05:18:50,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:18:50" (3/3) ... [2023-11-19 05:18:50,758 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label17.c [2023-11-19 05:18:50,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:18:50,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:18:50,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:18:50,854 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;@ed8bbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:18:50,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:18:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 05:18:50,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:50,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:50,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:50,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash 209353978, now seen corresponding path program 1 times [2023-11-19 05:18:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:50,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788107957] [2023-11-19 05:18:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:50,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:51,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:51,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788107957] [2023-11-19 05:18:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788107957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:51,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:51,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:18:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949919210] [2023-11-19 05:18:51,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:51,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:51,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:52,043 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:53,120 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-19 05:18:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-11-19 05:18:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:53,146 INFO L225 Difference]: With dead ends: 440 [2023-11-19 05:18:53,146 INFO L226 Difference]: Without dead ends: 289 [2023-11-19 05:18:53,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:53,153 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:53,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:18:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-19 05:18:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-19 05:18:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2023-11-19 05:18:53,219 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2023-11-19 05:18:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:53,221 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2023-11-19 05:18:53,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2023-11-19 05:18:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-19 05:18:53,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:53,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:53,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:18:53,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1094394265, now seen corresponding path program 1 times [2023-11-19 05:18:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444836715] [2023-11-19 05:18:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:53,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444836715] [2023-11-19 05:18:53,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444836715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:53,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:53,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:18:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650262204] [2023-11-19 05:18:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:53,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:53,691 INFO L87 Difference]: Start difference. First operand 289 states and 515 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:54,538 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2023-11-19 05:18:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-19 05:18:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:54,543 INFO L225 Difference]: With dead ends: 863 [2023-11-19 05:18:54,543 INFO L226 Difference]: Without dead ends: 575 [2023-11-19 05:18:54,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:54,547 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:54,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:18:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-19 05:18:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-19 05:18:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.740418118466899) internal successors, (999), 574 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 999 transitions. [2023-11-19 05:18:54,595 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 999 transitions. Word has length 151 [2023-11-19 05:18:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:54,597 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 999 transitions. [2023-11-19 05:18:54,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 999 transitions. [2023-11-19 05:18:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-19 05:18:54,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:54,612 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:18:54,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:54,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1051093184, now seen corresponding path program 1 times [2023-11-19 05:18:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:54,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385408011] [2023-11-19 05:18:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:54,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:18:55,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:55,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385408011] [2023-11-19 05:18:55,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385408011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:55,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:55,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:18:55,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258517517] [2023-11-19 05:18:55,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:55,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:55,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:55,056 INFO L87 Difference]: Start difference. First operand 575 states and 999 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:55,890 INFO L93 Difference]: Finished difference Result 1721 states and 2994 transitions. [2023-11-19 05:18:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:55,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-19 05:18:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:55,898 INFO L225 Difference]: With dead ends: 1721 [2023-11-19 05:18:55,898 INFO L226 Difference]: Without dead ends: 1147 [2023-11-19 05:18:55,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:55,909 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:55,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 261 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:18:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-19 05:18:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-19 05:18:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4773123909249564) internal successors, (1693), 1146 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1693 transitions. [2023-11-19 05:18:55,947 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1693 transitions. Word has length 163 [2023-11-19 05:18:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:55,948 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1693 transitions. [2023-11-19 05:18:55,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1693 transitions. [2023-11-19 05:18:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-19 05:18:55,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:55,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:55,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:18:55,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:55,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1982524855, now seen corresponding path program 1 times [2023-11-19 05:18:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:55,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087905896] [2023-11-19 05:18:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:56,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087905896] [2023-11-19 05:18:56,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087905896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:56,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:56,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:18:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564496288] [2023-11-19 05:18:56,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:56,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:56,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:56,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:56,250 INFO L87 Difference]: Start difference. First operand 1147 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:57,166 INFO L93 Difference]: Finished difference Result 3439 states and 5077 transitions. [2023-11-19 05:18:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:57,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2023-11-19 05:18:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:57,180 INFO L225 Difference]: With dead ends: 3439 [2023-11-19 05:18:57,180 INFO L226 Difference]: Without dead ends: 2293 [2023-11-19 05:18:57,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:57,183 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:57,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 69 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:18:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2023-11-19 05:18:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2023-11-19 05:18:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4026200873362444) internal successors, (3212), 2290 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3212 transitions. [2023-11-19 05:18:57,282 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3212 transitions. Word has length 166 [2023-11-19 05:18:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:57,282 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3212 transitions. [2023-11-19 05:18:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3212 transitions. [2023-11-19 05:18:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-19 05:18:57,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:57,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:57,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:18:57,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:57,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:57,292 INFO L85 PathProgramCache]: Analyzing trace with hash 441269376, now seen corresponding path program 1 times [2023-11-19 05:18:57,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:57,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951301229] [2023-11-19 05:18:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:57,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:18:57,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951301229] [2023-11-19 05:18:57,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951301229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:57,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:57,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:18:57,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247906844] [2023-11-19 05:18:57,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:57,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:57,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:57,538 INFO L87 Difference]: Start difference. First operand 2291 states and 3212 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:58,058 INFO L93 Difference]: Finished difference Result 4581 states and 6423 transitions. [2023-11-19 05:18:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:18:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-11-19 05:18:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:58,073 INFO L225 Difference]: With dead ends: 4581 [2023-11-19 05:18:58,073 INFO L226 Difference]: Without dead ends: 2291 [2023-11-19 05:18:58,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:18:58,081 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:58,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:18:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-11-19 05:18:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2023-11-19 05:18:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3624454148471616) internal successors, (3120), 2290 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3120 transitions. [2023-11-19 05:18:58,143 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3120 transitions. Word has length 176 [2023-11-19 05:18:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:58,145 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3120 transitions. [2023-11-19 05:18:58,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3120 transitions. [2023-11-19 05:18:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-19 05:18:58,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:58,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:58,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:18:58,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:58,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1441044862, now seen corresponding path program 1 times [2023-11-19 05:18:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:58,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125352954] [2023-11-19 05:18:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:58,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:58,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125352954] [2023-11-19 05:18:58,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125352954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440581604] [2023-11-19 05:18:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:58,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:58,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:58,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:58,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:18:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:58,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:18:59,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:18:59,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440581604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:59,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:18:59,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 05:18:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156904647] [2023-11-19 05:18:59,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:59,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:18:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:59,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:18:59,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:18:59,296 INFO L87 Difference]: Start difference. First operand 2291 states and 3120 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:00,183 INFO L93 Difference]: Finished difference Result 5725 states and 7858 transitions. [2023-11-19 05:19:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2023-11-19 05:19:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:00,208 INFO L225 Difference]: With dead ends: 5725 [2023-11-19 05:19:00,208 INFO L226 Difference]: Without dead ends: 3435 [2023-11-19 05:19:00,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:19:00,214 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:00,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 231 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:19:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2023-11-19 05:19:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2023-11-19 05:19:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3232382061735586) internal successors, (4544), 3434 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4544 transitions. [2023-11-19 05:19:00,315 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4544 transitions. Word has length 181 [2023-11-19 05:19:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:00,316 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4544 transitions. [2023-11-19 05:19:00,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4544 transitions. [2023-11-19 05:19:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-19 05:19:00,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:00,325 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:00,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:19:00,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:19:00,539 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:00,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 993121856, now seen corresponding path program 1 times [2023-11-19 05:19:00,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:00,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371562423] [2023-11-19 05:19:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:00,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:19:01,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371562423] [2023-11-19 05:19:01,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371562423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:01,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:01,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:19:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706767721] [2023-11-19 05:19:01,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:01,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:01,139 INFO L87 Difference]: Start difference. First operand 3435 states and 4544 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:02,020 INFO L93 Difference]: Finished difference Result 8299 states and 10944 transitions. [2023-11-19 05:19:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:02,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2023-11-19 05:19:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:02,047 INFO L225 Difference]: With dead ends: 8299 [2023-11-19 05:19:02,047 INFO L226 Difference]: Without dead ends: 4865 [2023-11-19 05:19:02,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:02,052 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:02,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 64 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:19:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2023-11-19 05:19:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4865. [2023-11-19 05:19:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 1.3042763157894737) internal successors, (6344), 4864 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 6344 transitions. [2023-11-19 05:19:02,192 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 6344 transitions. Word has length 195 [2023-11-19 05:19:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:02,192 INFO L495 AbstractCegarLoop]: Abstraction has 4865 states and 6344 transitions. [2023-11-19 05:19:02,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 6344 transitions. [2023-11-19 05:19:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-19 05:19:02,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:02,204 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:02,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:19:02,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:02,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1176659899, now seen corresponding path program 2 times [2023-11-19 05:19:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:02,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413323162] [2023-11-19 05:19:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:02,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:19:02,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413323162] [2023-11-19 05:19:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413323162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:02,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:19:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673169472] [2023-11-19 05:19:02,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:02,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:02,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:02,440 INFO L87 Difference]: Start difference. First operand 4865 states and 6344 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:02,826 INFO L93 Difference]: Finished difference Result 13020 states and 17040 transitions. [2023-11-19 05:19:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2023-11-19 05:19:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:02,871 INFO L225 Difference]: With dead ends: 13020 [2023-11-19 05:19:02,871 INFO L226 Difference]: Without dead ends: 8299 [2023-11-19 05:19:02,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:02,879 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 221 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:02,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 611 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:19:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2023-11-19 05:19:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 8297. [2023-11-19 05:19:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8297 states, 8296 states have (on average 1.2842333654773386) internal successors, (10654), 8296 states have internal predecessors, (10654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8297 states to 8297 states and 10654 transitions. [2023-11-19 05:19:03,139 INFO L78 Accepts]: Start accepts. Automaton has 8297 states and 10654 transitions. Word has length 202 [2023-11-19 05:19:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:03,139 INFO L495 AbstractCegarLoop]: Abstraction has 8297 states and 10654 transitions. [2023-11-19 05:19:03,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 8297 states and 10654 transitions. [2023-11-19 05:19:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-19 05:19:03,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:03,157 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:03,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:19:03,157 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:03,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1290877505, now seen corresponding path program 1 times [2023-11-19 05:19:03,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:03,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671474164] [2023-11-19 05:19:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:03,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 05:19:03,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:03,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671474164] [2023-11-19 05:19:03,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671474164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:03,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340805884] [2023-11-19 05:19:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:03,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:03,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:03,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:03,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:19:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:03,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:19:04,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:19:04,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:19:04,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340805884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:04,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:19:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 05:19:04,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267706921] [2023-11-19 05:19:04,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:19:04,079 INFO L87 Difference]: Start difference. First operand 8297 states and 10654 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:05,031 INFO L93 Difference]: Finished difference Result 19310 states and 24946 transitions. [2023-11-19 05:19:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:05,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2023-11-19 05:19:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:05,087 INFO L225 Difference]: With dead ends: 19310 [2023-11-19 05:19:05,087 INFO L226 Difference]: Without dead ends: 11157 [2023-11-19 05:19:05,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:19:05,101 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:05,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 227 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:19:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2023-11-19 05:19:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 11157. [2023-11-19 05:19:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11157 states, 11156 states have (on average 1.2538544281104338) internal successors, (13988), 11156 states have internal predecessors, (13988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11157 states to 11157 states and 13988 transitions. [2023-11-19 05:19:05,463 INFO L78 Accepts]: Start accepts. Automaton has 11157 states and 13988 transitions. Word has length 211 [2023-11-19 05:19:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:05,463 INFO L495 AbstractCegarLoop]: Abstraction has 11157 states and 13988 transitions. [2023-11-19 05:19:05,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 11157 states and 13988 transitions. [2023-11-19 05:19:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-11-19 05:19:05,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:05,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:05,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:19:05,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:05,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:05,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash -794797501, now seen corresponding path program 1 times [2023-11-19 05:19:05,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:05,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007625459] [2023-11-19 05:19:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:05,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:19:06,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:06,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007625459] [2023-11-19 05:19:06,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007625459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:06,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:06,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:19:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616095086] [2023-11-19 05:19:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:06,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:06,035 INFO L87 Difference]: Start difference. First operand 11157 states and 13988 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:07,021 INFO L93 Difference]: Finished difference Result 26603 states and 34052 transitions. [2023-11-19 05:19:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2023-11-19 05:19:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:07,053 INFO L225 Difference]: With dead ends: 26603 [2023-11-19 05:19:07,053 INFO L226 Difference]: Without dead ends: 15447 [2023-11-19 05:19:07,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:07,068 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:07,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 98 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:19:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15447 states. [2023-11-19 05:19:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15447 to 15447. [2023-11-19 05:19:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15447 states, 15446 states have (on average 1.2040657775475851) internal successors, (18598), 15446 states have internal predecessors, (18598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15447 states to 15447 states and 18598 transitions. [2023-11-19 05:19:07,383 INFO L78 Accepts]: Start accepts. Automaton has 15447 states and 18598 transitions. Word has length 213 [2023-11-19 05:19:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:07,383 INFO L495 AbstractCegarLoop]: Abstraction has 15447 states and 18598 transitions. [2023-11-19 05:19:07,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 15447 states and 18598 transitions. [2023-11-19 05:19:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-19 05:19:07,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:07,409 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:19:07,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:07,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash -367316284, now seen corresponding path program 1 times [2023-11-19 05:19:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:07,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242849291] [2023-11-19 05:19:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:07,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-19 05:19:07,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242849291] [2023-11-19 05:19:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242849291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:07,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:07,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:19:07,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26121090] [2023-11-19 05:19:07,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:07,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:19:07,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:19:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:19:07,925 INFO L87 Difference]: Start difference. First operand 15447 states and 18598 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:09,058 INFO L93 Difference]: Finished difference Result 40045 states and 48398 transitions. [2023-11-19 05:19:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:19:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2023-11-19 05:19:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:09,112 INFO L225 Difference]: With dead ends: 40045 [2023-11-19 05:19:09,112 INFO L226 Difference]: Without dead ends: 24742 [2023-11-19 05:19:09,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:19:09,132 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 328 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:09,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 10 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:19:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24742 states. [2023-11-19 05:19:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24742 to 24742. [2023-11-19 05:19:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24742 states, 24741 states have (on average 1.1799038034032578) internal successors, (29192), 24741 states have internal predecessors, (29192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24742 states to 24742 states and 29192 transitions. [2023-11-19 05:19:09,861 INFO L78 Accepts]: Start accepts. Automaton has 24742 states and 29192 transitions. Word has length 242 [2023-11-19 05:19:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:09,862 INFO L495 AbstractCegarLoop]: Abstraction has 24742 states and 29192 transitions. [2023-11-19 05:19:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24742 states and 29192 transitions. [2023-11-19 05:19:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-11-19 05:19:09,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:09,903 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:09,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:19:09,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:09,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash 777739647, now seen corresponding path program 1 times [2023-11-19 05:19:09,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:09,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985349356] [2023-11-19 05:19:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:09,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-19 05:19:10,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:10,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985349356] [2023-11-19 05:19:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985349356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:10,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:10,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:19:10,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395803111] [2023-11-19 05:19:10,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:10,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:19:10,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:10,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:19:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:19:10,367 INFO L87 Difference]: Start difference. First operand 24742 states and 29192 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:12,130 INFO L93 Difference]: Finished difference Result 91100 states and 107312 transitions. [2023-11-19 05:19:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:19:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2023-11-19 05:19:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:12,245 INFO L225 Difference]: With dead ends: 91100 [2023-11-19 05:19:12,245 INFO L226 Difference]: Without dead ends: 66502 [2023-11-19 05:19:12,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:19:12,276 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 400 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:12,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 18 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 05:19:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66502 states. [2023-11-19 05:19:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66502 to 66498. [2023-11-19 05:19:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66498 states, 66497 states have (on average 1.1736920462577258) internal successors, (78047), 66497 states have internal predecessors, (78047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66498 states to 66498 states and 78047 transitions. [2023-11-19 05:19:13,741 INFO L78 Accepts]: Start accepts. Automaton has 66498 states and 78047 transitions. Word has length 244 [2023-11-19 05:19:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:13,741 INFO L495 AbstractCegarLoop]: Abstraction has 66498 states and 78047 transitions. [2023-11-19 05:19:13,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 66498 states and 78047 transitions. [2023-11-19 05:19:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-19 05:19:13,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:13,773 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:13,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:19:13,774 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:13,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1485882666, now seen corresponding path program 1 times [2023-11-19 05:19:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:13,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708697403] [2023-11-19 05:19:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-19 05:19:14,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:14,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708697403] [2023-11-19 05:19:14,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708697403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:14,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:14,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:19:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513026548] [2023-11-19 05:19:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:14,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:14,542 INFO L87 Difference]: Start difference. First operand 66498 states and 78047 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:15,979 INFO L93 Difference]: Finished difference Result 146582 states and 172100 transitions. [2023-11-19 05:19:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2023-11-19 05:19:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:16,072 INFO L225 Difference]: With dead ends: 146582 [2023-11-19 05:19:16,072 INFO L226 Difference]: Without dead ends: 80228 [2023-11-19 05:19:16,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:16,096 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:16,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 95 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:19:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80228 states. [2023-11-19 05:19:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80228 to 73934. [2023-11-19 05:19:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73934 states, 73933 states have (on average 1.180230749462351) internal successors, (87258), 73933 states have internal predecessors, (87258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73934 states to 73934 states and 87258 transitions. [2023-11-19 05:19:17,610 INFO L78 Accepts]: Start accepts. Automaton has 73934 states and 87258 transitions. Word has length 262 [2023-11-19 05:19:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:17,611 INFO L495 AbstractCegarLoop]: Abstraction has 73934 states and 87258 transitions. [2023-11-19 05:19:17,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:19:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 73934 states and 87258 transitions. [2023-11-19 05:19:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-19 05:19:17,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:17,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:19:17,632 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:17,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1908378658, now seen corresponding path program 1 times [2023-11-19 05:19:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031116596] [2023-11-19 05:19:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:19,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031116596] [2023-11-19 05:19:19,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031116596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806288755] [2023-11-19 05:19:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:19,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:19,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:19,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:19,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_400e6bb0-fc3d-4a02-9eaa-afa248813a57/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:19:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:19,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:19:19,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:19:19,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:19:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:19:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806288755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:19:20,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875380157] [2023-11-19 05:19:20,112 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2023-11-19 05:19:20,112 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:19:20,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:19:20,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:19:20,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs