./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06b61c7a92b1aafb8eaed71c9c03004c8dc3a1341fd95aec7c0057c1c21f0a3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:49:54,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:49:54,421 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:49:54,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:49:54,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:49:54,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:49:54,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:49:54,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:49:54,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:49:54,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:49:54,482 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:49:54,483 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:49:54,483 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:49:54,485 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:49:54,486 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:49:54,486 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:49:54,486 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:49:54,487 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:49:54,487 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:49:54,488 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:49:54,488 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:49:54,489 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:49:54,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:49:54,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:49:54,491 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:49:54,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:49:54,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:49:54,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:49:54,493 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:49:54,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:49:54,512 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:49:54,513 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:49:54,513 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:49:54,513 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:49:54,513 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:49:54,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:49:54,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:49:54,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:54,515 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:49:54,515 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:49:54,515 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:49:54,516 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:49:54,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:49:54,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:49:54,517 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:49:54,517 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:49:54,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:49:54,518 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_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06b61c7a92b1aafb8eaed71c9c03004c8dc3a1341fd95aec7c0057c1c21f0a3d [2023-11-24 23:49:54,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:49:54,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:49:54,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:49:54,860 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:49:54,861 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:49:54,862 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/eca-rers2012/Problem03_label32.c [2023-11-24 23:49:57,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:49:58,389 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:49:58,390 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/sv-benchmarks/c/eca-rers2012/Problem03_label32.c [2023-11-24 23:49:58,413 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/data/947607c4e/f5693e2858b9416ca5b7d3e7ae484dff/FLAG1db8d83e7 [2023-11-24 23:49:58,433 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/data/947607c4e/f5693e2858b9416ca5b7d3e7ae484dff [2023-11-24 23:49:58,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:49:58,441 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:49:58,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:58,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:49:58,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:49:58,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:58" (1/1) ... [2023-11-24 23:49:58,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7159f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:58, skipping insertion in model container [2023-11-24 23:49:58,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:58" (1/1) ... [2023-11-24 23:49:58,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:49:59,184 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_39010508-c654-4e0f-a9f5-0239edaaa650/sv-benchmarks/c/eca-rers2012/Problem03_label32.c[59744,59757] [2023-11-24 23:49:59,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:59,237 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:49:59,607 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_39010508-c654-4e0f-a9f5-0239edaaa650/sv-benchmarks/c/eca-rers2012/Problem03_label32.c[59744,59757] [2023-11-24 23:49:59,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:59,639 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:49:59,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59 WrapperNode [2023-11-24 23:49:59,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:59,641 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:59,641 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:49:59,641 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:49:59,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,807 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-24 23:49:59,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:59,808 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:49:59,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:49:59,809 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:49:59,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,825 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,826 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,891 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:49:59,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:49:59,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:49:59,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:49:59,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:59,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:59,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:50:00,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:50:00,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:50:00,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:50:00,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:50:00,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:50:00,153 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:50:00,155 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:50:02,041 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:50:02,557 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:50:02,558 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:50:02,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:02 BoogieIcfgContainer [2023-11-24 23:50:02,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:50:02,563 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:50:02,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:50:02,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:50:02,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:49:58" (1/3) ... [2023-11-24 23:50:02,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346d4aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:02, skipping insertion in model container [2023-11-24 23:50:02,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (2/3) ... [2023-11-24 23:50:02,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346d4aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:02, skipping insertion in model container [2023-11-24 23:50:02,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:02" (3/3) ... [2023-11-24 23:50:02,571 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label32.c [2023-11-24 23:50:02,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:50:02,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:50:02,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:50:02,659 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;@58c92b46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:50:02,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:50:02,666 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) [2023-11-24 23:50:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-24 23:50:02,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:02,683 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] [2023-11-24 23:50:02,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:02,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1290448821, now seen corresponding path program 1 times [2023-11-24 23:50:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:02,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791563283] [2023-11-24 23:50:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:02,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:03,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:03,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791563283] [2023-11-24 23:50:03,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791563283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:03,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:03,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745062040] [2023-11-24 23:50:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:03,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:03,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:03,861 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) [2023-11-24 23:50:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:04,967 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-24 23:50:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:04,969 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 [2023-11-24 23:50:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:04,984 INFO L225 Difference]: With dead ends: 440 [2023-11-24 23:50:04,984 INFO L226 Difference]: Without dead ends: 289 [2023-11-24 23:50:04,988 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 [2023-11-24 23:50:04,992 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:04,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:50:05,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-24 23:50:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-24 23:50:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8055555555555556) internal successors, (520), 288 states have internal predecessors, (520), 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) [2023-11-24 23:50:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2023-11-24 23:50:05,057 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2023-11-24 23:50:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:05,058 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2023-11-24 23:50:05,059 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) [2023-11-24 23:50:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2023-11-24 23:50:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-24 23:50:05,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:05,064 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:05,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:50:05,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:05,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1984246025, now seen corresponding path program 1 times [2023-11-24 23:50:05,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:05,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574154436] [2023-11-24 23:50:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:05,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:05,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:05,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574154436] [2023-11-24 23:50:05,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574154436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:05,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:05,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547985076] [2023-11-24 23:50:05,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:05,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:05,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:05,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:05,535 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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) [2023-11-24 23:50:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:06,494 INFO L93 Difference]: Finished difference Result 863 states and 1557 transitions. [2023-11-24 23:50:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2023-11-24 23:50:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:06,501 INFO L225 Difference]: With dead ends: 863 [2023-11-24 23:50:06,501 INFO L226 Difference]: Without dead ends: 575 [2023-11-24 23:50:06,503 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 [2023-11-24 23:50:06,511 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 164 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:06,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 68 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:50:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-24 23:50:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-24 23:50:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.6724738675958188) internal successors, (960), 574 states have internal predecessors, (960), 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) [2023-11-24 23:50:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 960 transitions. [2023-11-24 23:50:06,549 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 960 transitions. Word has length 148 [2023-11-24 23:50:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:06,549 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 960 transitions. [2023-11-24 23:50:06,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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) [2023-11-24 23:50:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 960 transitions. [2023-11-24 23:50:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-24 23:50:06,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:06,564 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] [2023-11-24 23:50:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:50:06,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:06,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1772906836, now seen corresponding path program 1 times [2023-11-24 23:50:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:06,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436726985] [2023-11-24 23:50:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:06,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:06,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436726985] [2023-11-24 23:50:06,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436726985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:06,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:06,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:06,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061606659] [2023-11-24 23:50:06,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:06,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:06,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:06,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:06,815 INFO L87 Difference]: Start difference. First operand 575 states and 960 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) [2023-11-24 23:50:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:07,736 INFO L93 Difference]: Finished difference Result 1721 states and 2877 transitions. [2023-11-24 23:50:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:07,737 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 [2023-11-24 23:50:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:07,745 INFO L225 Difference]: With dead ends: 1721 [2023-11-24 23:50:07,745 INFO L226 Difference]: Without dead ends: 1147 [2023-11-24 23:50:07,748 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 [2023-11-24 23:50:07,750 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:07,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:50:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-24 23:50:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-24 23:50:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6265270506108203) internal successors, (1864), 1146 states have internal predecessors, (1864), 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) [2023-11-24 23:50:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1864 transitions. [2023-11-24 23:50:07,802 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1864 transitions. Word has length 151 [2023-11-24 23:50:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:07,802 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1864 transitions. [2023-11-24 23:50:07,803 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) [2023-11-24 23:50:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1864 transitions. [2023-11-24 23:50:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-24 23:50:07,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:07,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:07,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:50:07,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:07,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1271225597, now seen corresponding path program 1 times [2023-11-24 23:50:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312708419] [2023-11-24 23:50:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:50:08,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:08,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312708419] [2023-11-24 23:50:08,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312708419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:08,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:08,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:50:08,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122500891] [2023-11-24 23:50:08,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:08,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:50:08,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:08,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:50:08,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:50:08,877 INFO L87 Difference]: Start difference. First operand 1147 states and 1864 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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) [2023-11-24 23:50:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:09,961 INFO L93 Difference]: Finished difference Result 2434 states and 3990 transitions. [2023-11-24 23:50:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:50:09,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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 158 [2023-11-24 23:50:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:09,972 INFO L225 Difference]: With dead ends: 2434 [2023-11-24 23:50:09,972 INFO L226 Difference]: Without dead ends: 1147 [2023-11-24 23:50:09,974 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 [2023-11-24 23:50:09,984 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 251 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:09,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 11 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:50:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-24 23:50:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-24 23:50:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4589877835951135) internal successors, (1672), 1146 states have internal predecessors, (1672), 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) [2023-11-24 23:50:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1672 transitions. [2023-11-24 23:50:10,034 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1672 transitions. Word has length 158 [2023-11-24 23:50:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:10,035 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1672 transitions. [2023-11-24 23:50:10,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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) [2023-11-24 23:50:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1672 transitions. [2023-11-24 23:50:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-24 23:50:10,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:10,047 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, 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] [2023-11-24 23:50:10,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:50:10,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:10,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2087327368, now seen corresponding path program 1 times [2023-11-24 23:50:10,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:10,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65646002] [2023-11-24 23:50:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:10,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:10,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:10,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65646002] [2023-11-24 23:50:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65646002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:10,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:10,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:50:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855243165] [2023-11-24 23:50:10,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:50:10,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:50:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:50:10,873 INFO L87 Difference]: Start difference. First operand 1147 states and 1672 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 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) [2023-11-24 23:50:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:12,188 INFO L93 Difference]: Finished difference Result 3006 states and 4390 transitions. [2023-11-24 23:50:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:50:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 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 174 [2023-11-24 23:50:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:12,199 INFO L225 Difference]: With dead ends: 3006 [2023-11-24 23:50:12,200 INFO L226 Difference]: Without dead ends: 1719 [2023-11-24 23:50:12,201 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 [2023-11-24 23:50:12,202 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:12,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 23:50:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2023-11-24 23:50:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2023-11-24 23:50:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4348079161816065) internal successors, (2465), 1718 states have internal predecessors, (2465), 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) [2023-11-24 23:50:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2465 transitions. [2023-11-24 23:50:12,251 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2465 transitions. Word has length 174 [2023-11-24 23:50:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:12,252 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2465 transitions. [2023-11-24 23:50:12,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 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) [2023-11-24 23:50:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2465 transitions. [2023-11-24 23:50:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-24 23:50:12,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:12,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:12,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:50:12,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:12,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1065316963, now seen corresponding path program 1 times [2023-11-24 23:50:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:12,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280403371] [2023-11-24 23:50:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:50:12,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280403371] [2023-11-24 23:50:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280403371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:12,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:12,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:12,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775309688] [2023-11-24 23:50:12,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:12,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:12,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:12,710 INFO L87 Difference]: Start difference. First operand 1719 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2023-11-24 23:50:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:13,529 INFO L93 Difference]: Finished difference Result 5155 states and 7393 transitions. [2023-11-24 23:50:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 [2023-11-24 23:50:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:13,554 INFO L225 Difference]: With dead ends: 5155 [2023-11-24 23:50:13,554 INFO L226 Difference]: Without dead ends: 3437 [2023-11-24 23:50:13,557 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 [2023-11-24 23:50:13,559 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:13,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 21 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:50:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2023-11-24 23:50:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3435. [2023-11-24 23:50:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.4059405940594059) internal successors, (4828), 3434 states have internal predecessors, (4828), 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) [2023-11-24 23:50:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4828 transitions. [2023-11-24 23:50:13,689 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4828 transitions. Word has length 176 [2023-11-24 23:50:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:13,690 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4828 transitions. [2023-11-24 23:50:13,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2023-11-24 23:50:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4828 transitions. [2023-11-24 23:50:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-24 23:50:13,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:13,702 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] [2023-11-24 23:50:13,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:50:13,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:13,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash -805541895, now seen corresponding path program 1 times [2023-11-24 23:50:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:13,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117808264] [2023-11-24 23:50:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:14,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:14,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117808264] [2023-11-24 23:50:14,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117808264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:14,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981737361] [2023-11-24 23:50:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:14,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:14,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:14,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:50:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:14,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:50:14,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-24 23:50:14,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:14,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981737361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:14,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:50:14,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-24 23:50:14,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303094082] [2023-11-24 23:50:14,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:14,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:14,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:50:14,865 INFO L87 Difference]: Start difference. First operand 3435 states and 4828 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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) [2023-11-24 23:50:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:15,717 INFO L93 Difference]: Finished difference Result 7727 states and 10936 transitions. [2023-11-24 23:50:15,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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 181 [2023-11-24 23:50:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:15,743 INFO L225 Difference]: With dead ends: 7727 [2023-11-24 23:50:15,743 INFO L226 Difference]: Without dead ends: 4293 [2023-11-24 23:50:15,748 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 [2023-11-24 23:50:15,750 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:15,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 203 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:50:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2023-11-24 23:50:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2023-11-24 23:50:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.4037744641192917) internal successors, (6025), 4292 states have internal predecessors, (6025), 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) [2023-11-24 23:50:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6025 transitions. [2023-11-24 23:50:15,869 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6025 transitions. Word has length 181 [2023-11-24 23:50:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:15,871 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 6025 transitions. [2023-11-24 23:50:15,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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) [2023-11-24 23:50:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6025 transitions. [2023-11-24 23:50:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-24 23:50:15,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:15,883 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:15,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:50:16,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 23:50:16,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:16,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 476747189, now seen corresponding path program 1 times [2023-11-24 23:50:16,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:16,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401704709] [2023-11-24 23:50:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-24 23:50:16,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:16,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401704709] [2023-11-24 23:50:16,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401704709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:16,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790557593] [2023-11-24 23:50:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:16,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:16,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:16,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:16,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:50:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:16,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:50:16,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-24 23:50:17,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:17,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790557593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:17,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:50:17,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 23:50:17,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093773370] [2023-11-24 23:50:17,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:17,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:17,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:17,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:50:17,027 INFO L87 Difference]: Start difference. First operand 4293 states and 6025 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2023-11-24 23:50:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:17,381 INFO L93 Difference]: Finished difference Result 12877 states and 18073 transitions. [2023-11-24 23:50:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 196 [2023-11-24 23:50:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:17,429 INFO L225 Difference]: With dead ends: 12877 [2023-11-24 23:50:17,429 INFO L226 Difference]: Without dead ends: 8585 [2023-11-24 23:50:17,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:50:17,437 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 188 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:17,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 324 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:50:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2023-11-24 23:50:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8583. [2023-11-24 23:50:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.3992076439058494) internal successors, (12008), 8582 states have internal predecessors, (12008), 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) [2023-11-24 23:50:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 12008 transitions. [2023-11-24 23:50:17,677 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 12008 transitions. Word has length 196 [2023-11-24 23:50:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:17,678 INFO L495 AbstractCegarLoop]: Abstraction has 8583 states and 12008 transitions. [2023-11-24 23:50:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2023-11-24 23:50:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 12008 transitions. [2023-11-24 23:50:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-24 23:50:17,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:17,698 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, 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] [2023-11-24 23:50:17,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:17,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 23:50:17,906 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:17,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 94856137, now seen corresponding path program 1 times [2023-11-24 23:50:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:17,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869376949] [2023-11-24 23:50:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-24 23:50:18,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869376949] [2023-11-24 23:50:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869376949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:18,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:18,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:50:18,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100143927] [2023-11-24 23:50:18,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:18,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:50:18,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:50:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:50:18,387 INFO L87 Difference]: Start difference. First operand 8583 states and 12008 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 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) [2023-11-24 23:50:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:19,628 INFO L93 Difference]: Finished difference Result 25747 states and 35931 transitions. [2023-11-24 23:50:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:50:19,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 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 205 [2023-11-24 23:50:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:19,689 INFO L225 Difference]: With dead ends: 25747 [2023-11-24 23:50:19,689 INFO L226 Difference]: Without dead ends: 17165 [2023-11-24 23:50:19,703 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 [2023-11-24 23:50:19,704 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 464 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:19,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 56 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 23:50:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17165 states. [2023-11-24 23:50:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17165 to 17163. [2023-11-24 23:50:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17163 states, 17162 states have (on average 1.3737326651905373) internal successors, (23576), 17162 states have internal predecessors, (23576), 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) [2023-11-24 23:50:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17163 states to 17163 states and 23576 transitions. [2023-11-24 23:50:20,268 INFO L78 Accepts]: Start accepts. Automaton has 17163 states and 23576 transitions. Word has length 205 [2023-11-24 23:50:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:20,268 INFO L495 AbstractCegarLoop]: Abstraction has 17163 states and 23576 transitions. [2023-11-24 23:50:20,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 3 states have internal predecessors, (175), 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) [2023-11-24 23:50:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17163 states and 23576 transitions. [2023-11-24 23:50:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-24 23:50:20,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:20,302 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, 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] [2023-11-24 23:50:20,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:50:20,303 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:20,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:20,303 INFO L85 PathProgramCache]: Analyzing trace with hash 258307881, now seen corresponding path program 2 times [2023-11-24 23:50:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:20,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824484865] [2023-11-24 23:50:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:20,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 67 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 23:50:20,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824484865] [2023-11-24 23:50:20,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824484865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947046934] [2023-11-24 23:50:20,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:50:20,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:20,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:20,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:20,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:50:21,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 23:50:21,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:50:21,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:50:21,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-24 23:50:21,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947046934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:21,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:50:21,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-24 23:50:21,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014842413] [2023-11-24 23:50:21,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:21,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:50:21,261 INFO L87 Difference]: Start difference. First operand 17163 states and 23576 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2023-11-24 23:50:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:22,233 INFO L93 Difference]: Finished difference Result 42190 states and 58124 transitions. [2023-11-24 23:50:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 205 [2023-11-24 23:50:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:22,288 INFO L225 Difference]: With dead ends: 42190 [2023-11-24 23:50:22,288 INFO L226 Difference]: Without dead ends: 25028 [2023-11-24 23:50:22,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:50:22,311 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:22,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 226 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:50:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25028 states. [2023-11-24 23:50:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25028 to 25028. [2023-11-24 23:50:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25028 states, 25027 states have (on average 1.215007791585088) internal successors, (30408), 25027 states have internal predecessors, (30408), 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) [2023-11-24 23:50:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25028 states to 25028 states and 30408 transitions. [2023-11-24 23:50:23,045 INFO L78 Accepts]: Start accepts. Automaton has 25028 states and 30408 transitions. Word has length 205 [2023-11-24 23:50:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:23,046 INFO L495 AbstractCegarLoop]: Abstraction has 25028 states and 30408 transitions. [2023-11-24 23:50:23,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2023-11-24 23:50:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 25028 states and 30408 transitions. [2023-11-24 23:50:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-24 23:50:23,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:23,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2023-11-24 23:50:23,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:50:23,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:23,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1896668581, now seen corresponding path program 1 times [2023-11-24 23:50:23,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:23,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510712634] [2023-11-24 23:50:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:23,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-24 23:50:23,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:23,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510712634] [2023-11-24 23:50:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510712634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:23,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:23,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179812881] [2023-11-24 23:50:23,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:23,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:23,800 INFO L87 Difference]: Start difference. First operand 25028 states and 30408 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) [2023-11-24 23:50:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:24,856 INFO L93 Difference]: Finished difference Result 54202 states and 66121 transitions. [2023-11-24 23:50:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:24,857 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 209 [2023-11-24 23:50:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:24,916 INFO L225 Difference]: With dead ends: 54202 [2023-11-24 23:50:24,916 INFO L226 Difference]: Without dead ends: 29604 [2023-11-24 23:50:24,947 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 [2023-11-24 23:50:24,948 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 130 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:24,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 67 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:50:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29604 states. [2023-11-24 23:50:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29604 to 29604. [2023-11-24 23:50:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29604 states, 29603 states have (on average 1.2126135864608316) internal successors, (35897), 29603 states have internal predecessors, (35897), 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) [2023-11-24 23:50:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29604 states to 29604 states and 35897 transitions. [2023-11-24 23:50:25,736 INFO L78 Accepts]: Start accepts. Automaton has 29604 states and 35897 transitions. Word has length 209 [2023-11-24 23:50:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:25,736 INFO L495 AbstractCegarLoop]: Abstraction has 29604 states and 35897 transitions. [2023-11-24 23:50:25,737 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) [2023-11-24 23:50:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29604 states and 35897 transitions. [2023-11-24 23:50:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-24 23:50:25,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:25,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:25,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:50:25,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:25,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash -757132470, now seen corresponding path program 1 times [2023-11-24 23:50:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:25,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124166644] [2023-11-24 23:50:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-24 23:50:26,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124166644] [2023-11-24 23:50:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124166644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20417475] [2023-11-24 23:50:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:26,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:26,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:50:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:26,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:50:26,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-24 23:50:26,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:26,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20417475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:26,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:50:26,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 23:50:26,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241818543] [2023-11-24 23:50:26,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:50:26,914 INFO L87 Difference]: Start difference. First operand 29604 states and 35897 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) [2023-11-24 23:50:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:28,037 INFO L93 Difference]: Finished difference Result 64927 states and 80304 transitions. [2023-11-24 23:50:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:28,038 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 216 [2023-11-24 23:50:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:28,121 INFO L225 Difference]: With dead ends: 64927 [2023-11-24 23:50:28,122 INFO L226 Difference]: Without dead ends: 35467 [2023-11-24 23:50:28,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:50:28,146 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 136 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:28,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 65 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:50:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35467 states. [2023-11-24 23:50:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35467 to 28460. [2023-11-24 23:50:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28460 states, 28459 states have (on average 1.1961418180540426) internal successors, (34041), 28459 states have internal predecessors, (34041), 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) [2023-11-24 23:50:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28460 states to 28460 states and 34041 transitions. [2023-11-24 23:50:28,722 INFO L78 Accepts]: Start accepts. Automaton has 28460 states and 34041 transitions. Word has length 216 [2023-11-24 23:50:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:28,723 INFO L495 AbstractCegarLoop]: Abstraction has 28460 states and 34041 transitions. [2023-11-24 23:50:28,723 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) [2023-11-24 23:50:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 28460 states and 34041 transitions. [2023-11-24 23:50:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-24 23:50:28,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:28,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:28,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:28,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:50:28,954 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:28,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1207401292, now seen corresponding path program 1 times [2023-11-24 23:50:28,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:28,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212389992] [2023-11-24 23:50:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:28,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:30,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:30,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212389992] [2023-11-24 23:50:30,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212389992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:30,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851260539] [2023-11-24 23:50:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:30,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:30,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:30,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:50:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:31,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:50:31,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:50:31,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851260539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:31,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:50:31,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 23:50:31,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934710491] [2023-11-24 23:50:31,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:31,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:50:31,375 INFO L87 Difference]: Start difference. First operand 28460 states and 34041 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2023-11-24 23:50:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:32,378 INFO L93 Difference]: Finished difference Result 70361 states and 84377 transitions. [2023-11-24 23:50:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 221 [2023-11-24 23:50:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:32,452 INFO L225 Difference]: With dead ends: 70361 [2023-11-24 23:50:32,453 INFO L226 Difference]: Without dead ends: 42188 [2023-11-24 23:50:32,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:50:32,474 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:32,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 209 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:50:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42188 states. [2023-11-24 23:50:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42188 to 41902. [2023-11-24 23:50:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41902 states, 41901 states have (on average 1.1859621488747285) internal successors, (49693), 41901 states have internal predecessors, (49693), 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) [2023-11-24 23:50:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41902 states to 41902 states and 49693 transitions. [2023-11-24 23:50:33,453 INFO L78 Accepts]: Start accepts. Automaton has 41902 states and 49693 transitions. Word has length 221 [2023-11-24 23:50:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:33,454 INFO L495 AbstractCegarLoop]: Abstraction has 41902 states and 49693 transitions. [2023-11-24 23:50:33,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2023-11-24 23:50:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 41902 states and 49693 transitions. [2023-11-24 23:50:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-24 23:50:33,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:33,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 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] [2023-11-24 23:50:33,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:33,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 23:50:33,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:33,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1443305453, now seen corresponding path program 1 times [2023-11-24 23:50:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:33,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090154203] [2023-11-24 23:50:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:50:35,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090154203] [2023-11-24 23:50:35,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090154203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:35,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296660061] [2023-11-24 23:50:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:35,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:35,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:50:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:35,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:50:35,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-24 23:50:36,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:36,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296660061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:36,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:50:36,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:50:36,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395518663] [2023-11-24 23:50:36,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:36,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:36,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:36,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:50:36,194 INFO L87 Difference]: Start difference. First operand 41902 states and 49693 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2023-11-24 23:50:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:37,414 INFO L93 Difference]: Finished difference Result 98675 states and 117628 transitions. [2023-11-24 23:50:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 231 [2023-11-24 23:50:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:37,511 INFO L225 Difference]: With dead ends: 98675 [2023-11-24 23:50:37,511 INFO L226 Difference]: Without dead ends: 57203 [2023-11-24 23:50:37,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:50:37,539 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:37,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:50:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57203 states. [2023-11-24 23:50:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57203 to 53771. [2023-11-24 23:50:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53771 states, 53770 states have (on average 1.180565371024735) internal successors, (63479), 53770 states have internal predecessors, (63479), 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) [2023-11-24 23:50:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53771 states to 53771 states and 63479 transitions. [2023-11-24 23:50:38,738 INFO L78 Accepts]: Start accepts. Automaton has 53771 states and 63479 transitions. Word has length 231 [2023-11-24 23:50:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:38,739 INFO L495 AbstractCegarLoop]: Abstraction has 53771 states and 63479 transitions. [2023-11-24 23:50:38,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2023-11-24 23:50:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 53771 states and 63479 transitions. [2023-11-24 23:50:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-11-24 23:50:38,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:38,786 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:38,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:38,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39010508-c654-4e0f-a9f5-0239edaaa650/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 23:50:38,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:38,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash -691988022, now seen corresponding path program 1 times [2023-11-24 23:50:38,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:38,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352981734] [2023-11-24 23:50:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat