./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label22.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/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_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label22.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/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_2b6be329-afe3-4b6f-bc13-614c46e154b1/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 f365a0f129fa90e96f59a2a67efc46f6bd75f705664f3dab23b0f5e5824e9e07 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:07:41,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:07:41,864 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:07:41,869 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:07:41,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:07:41,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:07:41,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:07:41,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:07:41,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:07:41,899 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:07:41,900 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:07:41,900 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:07:41,901 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:07:41,902 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:07:41,902 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:07:41,903 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:07:41,903 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:07:41,904 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:07:41,904 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:07:41,905 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:07:41,906 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:07:41,906 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:07:41,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:07:41,908 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:07:41,908 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:07:41,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:07:41,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:07:41,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:07:41,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:07:41,910 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:07:41,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:07:41,911 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:07:41,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:07:41,912 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:07:41,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:07:41,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:07:41,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:07:41,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:07:41,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:07:41,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:07:41,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:07:41,916 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:07:41,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:07:41,916 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:07:41,917 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:07:41,917 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:07:41,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:07:41,918 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_2b6be329-afe3-4b6f-bc13-614c46e154b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f365a0f129fa90e96f59a2a67efc46f6bd75f705664f3dab23b0f5e5824e9e07 [2023-11-25 00:07:42,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:07:42,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:07:42,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:07:42,370 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:07:42,370 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:07:42,372 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/eca-rers2012/Problem03_label22.c [2023-11-25 00:07:45,533 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:07:45,994 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:07:45,995 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/sv-benchmarks/c/eca-rers2012/Problem03_label22.c [2023-11-25 00:07:46,020 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/data/1f16211ac/342bcbbff52949faa8449877a8476b38/FLAGdf306fd28 [2023-11-25 00:07:46,043 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/data/1f16211ac/342bcbbff52949faa8449877a8476b38 [2023-11-25 00:07:46,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:07:46,055 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:07:46,059 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:46,059 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:07:46,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:07:46,066 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:46" (1/1) ... [2023-11-25 00:07:46,067 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c011789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:46, skipping insertion in model container [2023-11-25 00:07:46,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:46" (1/1) ... [2023-11-25 00:07:46,167 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:07:46,929 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_2b6be329-afe3-4b6f-bc13-614c46e154b1/sv-benchmarks/c/eca-rers2012/Problem03_label22.c[56764,56777] [2023-11-25 00:07:47,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:47,058 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:07:47,365 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_2b6be329-afe3-4b6f-bc13-614c46e154b1/sv-benchmarks/c/eca-rers2012/Problem03_label22.c[56764,56777] [2023-11-25 00:07:47,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:47,407 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:07:47,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47 WrapperNode [2023-11-25 00:07:47,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:47,410 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:47,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:07:47,411 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:07:47,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,476 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,613 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-25 00:07:47,614 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:47,615 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:07:47,615 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:07:47,616 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:07:47,628 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,654 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,762 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,793 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,823 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:07:47,824 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:07:47,824 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:07:47,824 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:07:47,825 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:47,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:07:47,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:47,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:07:47,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:07:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:07:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:07:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:07:47,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:07:48,121 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:07:48,124 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:07:50,552 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:07:51,083 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:07:51,086 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:07:51,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:07:51 BoogieIcfgContainer [2023-11-25 00:07:51,088 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:07:51,090 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:07:51,091 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:07:51,094 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:07:51,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:07:46" (1/3) ... [2023-11-25 00:07:51,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124a9c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:07:51, skipping insertion in model container [2023-11-25 00:07:51,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (2/3) ... [2023-11-25 00:07:51,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124a9c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:07:51, skipping insertion in model container [2023-11-25 00:07:51,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:07:51" (3/3) ... [2023-11-25 00:07:51,100 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label22.c [2023-11-25 00:07:51,122 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:07:51,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:07:51,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:07:51,203 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;@472b833b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:07:51,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:07:51,210 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) [2023-11-25 00:07:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-25 00:07:51,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:51,227 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] [2023-11-25 00:07:51,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:51,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1290440306, now seen corresponding path program 1 times [2023-11-25 00:07:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:51,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265190341] [2023-11-25 00:07:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:52,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:52,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265190341] [2023-11-25 00:07:52,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265190341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:52,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:52,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:07:52,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032622472] [2023-11-25 00:07:52,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:52,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:07:52,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:52,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:07:52,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:52,423 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) [2023-11-25 00:07:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:53,559 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-25 00:07:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:07:53,563 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 [2023-11-25 00:07:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:53,582 INFO L225 Difference]: With dead ends: 440 [2023-11-25 00:07:53,583 INFO L226 Difference]: Without dead ends: 289 [2023-11-25 00:07:53,588 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 [2023-11-25 00:07:53,594 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:53,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 53 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:07:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-25 00:07:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-25 00:07:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 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) [2023-11-25 00:07:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2023-11-25 00:07:53,674 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2023-11-25 00:07:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:53,675 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2023-11-25 00:07:53,676 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) [2023-11-25 00:07:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2023-11-25 00:07:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-25 00:07:53,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:53,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:53,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:07:53,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:53,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 265429705, now seen corresponding path program 1 times [2023-11-25 00:07:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:53,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399450606] [2023-11-25 00:07:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:54,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399450606] [2023-11-25 00:07:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399450606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:54,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:54,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:07:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051309515] [2023-11-25 00:07:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:54,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:07:54,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:54,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:07:54,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:54,274 INFO L87 Difference]: Start difference. First operand 289 states and 521 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) [2023-11-25 00:07:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:55,273 INFO L93 Difference]: Finished difference Result 865 states and 1561 transitions. [2023-11-25 00:07:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:07:55,273 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 147 [2023-11-25 00:07:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:55,279 INFO L225 Difference]: With dead ends: 865 [2023-11-25 00:07:55,279 INFO L226 Difference]: Without dead ends: 577 [2023-11-25 00:07:55,281 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 [2023-11-25 00:07:55,283 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:55,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 18 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:07:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-25 00:07:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2023-11-25 00:07:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7804878048780488) internal successors, (1022), 574 states have internal predecessors, (1022), 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) [2023-11-25 00:07:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1022 transitions. [2023-11-25 00:07:55,330 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1022 transitions. Word has length 147 [2023-11-25 00:07:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:55,331 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1022 transitions. [2023-11-25 00:07:55,331 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) [2023-11-25 00:07:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1022 transitions. [2023-11-25 00:07:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-25 00:07:55,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:55,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2023-11-25 00:07:55,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:07:55,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:55,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash -635008008, now seen corresponding path program 1 times [2023-11-25 00:07:55,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:55,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392557882] [2023-11-25 00:07:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:55,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:55,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:55,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392557882] [2023-11-25 00:07:55,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392557882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:55,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:55,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:07:55,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409178253] [2023-11-25 00:07:55,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:55,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:07:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:07:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:55,653 INFO L87 Difference]: Start difference. First operand 575 states and 1022 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-11-25 00:07:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:56,572 INFO L93 Difference]: Finished difference Result 1721 states and 3063 transitions. [2023-11-25 00:07:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:07:56,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 154 [2023-11-25 00:07:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:56,583 INFO L225 Difference]: With dead ends: 1721 [2023-11-25 00:07:56,584 INFO L226 Difference]: Without dead ends: 1147 [2023-11-25 00:07:56,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:56,598 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 174 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:56,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 42 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:07:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-25 00:07:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-25 00:07:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.669284467713787) internal successors, (1913), 1146 states have internal predecessors, (1913), 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) [2023-11-25 00:07:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1913 transitions. [2023-11-25 00:07:56,657 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1913 transitions. Word has length 154 [2023-11-25 00:07:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:56,658 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1913 transitions. [2023-11-25 00:07:56,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-11-25 00:07:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1913 transitions. [2023-11-25 00:07:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-25 00:07:56,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:56,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-11-25 00:07:56,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:07:56,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:56,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash 466613480, now seen corresponding path program 1 times [2023-11-25 00:07:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:56,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619035658] [2023-11-25 00:07:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:56,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:07:56,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:56,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619035658] [2023-11-25 00:07:56,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619035658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:56,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:56,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:07:56,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354466234] [2023-11-25 00:07:56,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:56,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:07:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:56,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:07:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:56,872 INFO L87 Difference]: Start difference. First operand 1147 states and 1913 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2023-11-25 00:07:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:57,874 INFO L93 Difference]: Finished difference Result 3437 states and 5736 transitions. [2023-11-25 00:07:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:07:57,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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 155 [2023-11-25 00:07:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:57,891 INFO L225 Difference]: With dead ends: 3437 [2023-11-25 00:07:57,892 INFO L226 Difference]: Without dead ends: 2291 [2023-11-25 00:07:57,894 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 [2023-11-25 00:07:57,906 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 146 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:57,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 62 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:07:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-11-25 00:07:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2023-11-25 00:07:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.6192139737991267) internal successors, (3708), 2290 states have internal predecessors, (3708), 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) [2023-11-25 00:07:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3708 transitions. [2023-11-25 00:07:57,986 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3708 transitions. Word has length 155 [2023-11-25 00:07:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:57,986 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3708 transitions. [2023-11-25 00:07:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2023-11-25 00:07:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3708 transitions. [2023-11-25 00:07:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-25 00:07:57,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:57,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:07:57,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:07:57,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:57,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:57,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2001597746, now seen corresponding path program 1 times [2023-11-25 00:07:57,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:57,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116665159] [2023-11-25 00:07:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:57,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:07:58,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116665159] [2023-11-25 00:07:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116665159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:58,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:58,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:07:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673443936] [2023-11-25 00:07:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:58,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:07:58,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:58,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:07:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:07:58,334 INFO L87 Difference]: Start difference. First operand 2291 states and 3708 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2023-11-25 00:07:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:59,437 INFO L93 Difference]: Finished difference Result 6297 states and 10213 transitions. [2023-11-25 00:07:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:07:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 156 [2023-11-25 00:07:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:59,464 INFO L225 Difference]: With dead ends: 6297 [2023-11-25 00:07:59,464 INFO L226 Difference]: Without dead ends: 4007 [2023-11-25 00:07:59,468 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 [2023-11-25 00:07:59,469 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 156 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:59,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 58 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:07:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2023-11-25 00:07:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 4007. [2023-11-25 00:07:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.5491762356465302) internal successors, (6206), 4006 states have internal predecessors, (6206), 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) [2023-11-25 00:07:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 6206 transitions. [2023-11-25 00:07:59,598 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 6206 transitions. Word has length 156 [2023-11-25 00:07:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:59,598 INFO L495 AbstractCegarLoop]: Abstraction has 4007 states and 6206 transitions. [2023-11-25 00:07:59,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2023-11-25 00:07:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 6206 transitions. [2023-11-25 00:07:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-25 00:07:59,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:59,611 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2023-11-25 00:07:59,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:07:59,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:59,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1688445660, now seen corresponding path program 1 times [2023-11-25 00:07:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:59,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337779655] [2023-11-25 00:07:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-25 00:08:00,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:00,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337779655] [2023-11-25 00:08:00,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337779655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:00,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:00,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:08:00,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613226207] [2023-11-25 00:08:00,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:00,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:00,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:00,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:00,028 INFO L87 Difference]: Start difference. First operand 4007 states and 6206 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:08:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:01,143 INFO L93 Difference]: Finished difference Result 11731 states and 18062 transitions. [2023-11-25 00:08:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:01,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2023-11-25 00:08:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:01,187 INFO L225 Difference]: With dead ends: 11731 [2023-11-25 00:08:01,187 INFO L226 Difference]: Without dead ends: 7725 [2023-11-25 00:08:01,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:01,195 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:01,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 262 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:08:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2023-11-25 00:08:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 7725. [2023-11-25 00:08:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7725 states, 7724 states have (on average 1.4199896426721905) internal successors, (10968), 7724 states have internal predecessors, (10968), 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) [2023-11-25 00:08:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7725 states to 7725 states and 10968 transitions. [2023-11-25 00:08:01,478 INFO L78 Accepts]: Start accepts. Automaton has 7725 states and 10968 transitions. Word has length 169 [2023-11-25 00:08:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:01,479 INFO L495 AbstractCegarLoop]: Abstraction has 7725 states and 10968 transitions. [2023-11-25 00:08:01,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:08:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7725 states and 10968 transitions. [2023-11-25 00:08:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-25 00:08:01,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:01,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:01,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:08:01,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:01,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1741145605, now seen corresponding path program 1 times [2023-11-25 00:08:01,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:01,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909189165] [2023-11-25 00:08:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:01,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-25 00:08:02,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909189165] [2023-11-25 00:08:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909189165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:02,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:02,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:08:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169342729] [2023-11-25 00:08:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:02,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:02,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:02,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:02,130 INFO L87 Difference]: Start difference. First operand 7725 states and 10968 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) [2023-11-25 00:08:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:03,220 INFO L93 Difference]: Finished difference Result 20883 states and 29880 transitions. [2023-11-25 00:08:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:03,221 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 178 [2023-11-25 00:08:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:03,302 INFO L225 Difference]: With dead ends: 20883 [2023-11-25 00:08:03,302 INFO L226 Difference]: Without dead ends: 13731 [2023-11-25 00:08:03,312 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 [2023-11-25 00:08:03,313 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 136 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:03,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 68 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:08:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13731 states. [2023-11-25 00:08:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13731 to 13731. [2023-11-25 00:08:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13731 states, 13730 states have (on average 1.388856518572469) internal successors, (19069), 13730 states have internal predecessors, (19069), 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) [2023-11-25 00:08:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13731 states to 13731 states and 19069 transitions. [2023-11-25 00:08:03,625 INFO L78 Accepts]: Start accepts. Automaton has 13731 states and 19069 transitions. Word has length 178 [2023-11-25 00:08:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:03,627 INFO L495 AbstractCegarLoop]: Abstraction has 13731 states and 19069 transitions. [2023-11-25 00:08:03,628 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) [2023-11-25 00:08:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13731 states and 19069 transitions. [2023-11-25 00:08:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-11-25 00:08:03,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:03,654 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:03,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:08:03,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:03,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1495966481, now seen corresponding path program 1 times [2023-11-25 00:08:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:03,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723331217] [2023-11-25 00:08:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-25 00:08:04,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:04,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723331217] [2023-11-25 00:08:04,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723331217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:04,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:04,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:08:04,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295885866] [2023-11-25 00:08:04,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:04,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:04,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:04,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:04,105 INFO L87 Difference]: Start difference. First operand 13731 states and 19069 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-25 00:08:05,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:05,215 INFO L93 Difference]: Finished difference Result 31322 states and 43627 transitions. [2023-11-25 00:08:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 197 [2023-11-25 00:08:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:05,259 INFO L225 Difference]: With dead ends: 31322 [2023-11-25 00:08:05,259 INFO L226 Difference]: Without dead ends: 17592 [2023-11-25 00:08:05,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:05,279 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:05,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 255 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:08:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17592 states. [2023-11-25 00:08:05,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17592 to 17020. [2023-11-25 00:08:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.3430871379046947) internal successors, (22858), 17019 states have internal predecessors, (22858), 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) [2023-11-25 00:08:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 22858 transitions. [2023-11-25 00:08:05,676 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 22858 transitions. Word has length 197 [2023-11-25 00:08:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:05,676 INFO L495 AbstractCegarLoop]: Abstraction has 17020 states and 22858 transitions. [2023-11-25 00:08:05,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2023-11-25 00:08:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 22858 transitions. [2023-11-25 00:08:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-25 00:08:05,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:05,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:08:05,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:05,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash 711627689, now seen corresponding path program 1 times [2023-11-25 00:08:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126326509] [2023-11-25 00:08:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-25 00:08:06,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:06,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126326509] [2023-11-25 00:08:06,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126326509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:06,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:06,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:08:06,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373188366] [2023-11-25 00:08:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:06,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:06,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:06,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:06,464 INFO L87 Difference]: Start difference. First operand 17020 states and 22858 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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) [2023-11-25 00:08:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:07,736 INFO L93 Difference]: Finished difference Result 36041 states and 48245 transitions. [2023-11-25 00:08:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2023-11-25 00:08:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:07,783 INFO L225 Difference]: With dead ends: 36041 [2023-11-25 00:08:07,783 INFO L226 Difference]: Without dead ends: 20309 [2023-11-25 00:08:07,805 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 [2023-11-25 00:08:07,806 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:07,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 90 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:08:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20309 states. [2023-11-25 00:08:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20309 to 20309. [2023-11-25 00:08:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20309 states, 20308 states have (on average 1.3243056923379948) internal successors, (26894), 20308 states have internal predecessors, (26894), 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) [2023-11-25 00:08:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20309 states to 20309 states and 26894 transitions. [2023-11-25 00:08:08,272 INFO L78 Accepts]: Start accepts. Automaton has 20309 states and 26894 transitions. Word has length 202 [2023-11-25 00:08:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:08,273 INFO L495 AbstractCegarLoop]: Abstraction has 20309 states and 26894 transitions. [2023-11-25 00:08:08,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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) [2023-11-25 00:08:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 20309 states and 26894 transitions. [2023-11-25 00:08:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-25 00:08:08,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:08,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:08,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:08:08,308 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:08,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2112550330, now seen corresponding path program 1 times [2023-11-25 00:08:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:08,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388819844] [2023-11-25 00:08:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:08,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-25 00:08:08,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:08,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388819844] [2023-11-25 00:08:08,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388819844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:08,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:08,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:08:08,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163512977] [2023-11-25 00:08:08,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:08,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:08,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:08,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:08,896 INFO L87 Difference]: Start difference. First operand 20309 states and 26894 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2023-11-25 00:08:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:10,105 INFO L93 Difference]: Finished difference Result 42619 states and 56419 transitions. [2023-11-25 00:08:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 203 [2023-11-25 00:08:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:10,155 INFO L225 Difference]: With dead ends: 42619 [2023-11-25 00:08:10,155 INFO L226 Difference]: Without dead ends: 23741 [2023-11-25 00:08:10,177 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 [2023-11-25 00:08:10,178 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:10,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 95 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:08:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23741 states. [2023-11-25 00:08:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23741 to 23741. [2023-11-25 00:08:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23741 states, 23740 states have (on average 1.3021482729570346) internal successors, (30913), 23740 states have internal predecessors, (30913), 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) [2023-11-25 00:08:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23741 states to 23741 states and 30913 transitions. [2023-11-25 00:08:10,708 INFO L78 Accepts]: Start accepts. Automaton has 23741 states and 30913 transitions. Word has length 203 [2023-11-25 00:08:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:10,708 INFO L495 AbstractCegarLoop]: Abstraction has 23741 states and 30913 transitions. [2023-11-25 00:08:10,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2023-11-25 00:08:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 23741 states and 30913 transitions. [2023-11-25 00:08:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-25 00:08:10,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:10,779 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-25 00:08:10,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:10,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:10,780 INFO L85 PathProgramCache]: Analyzing trace with hash -762494566, now seen corresponding path program 1 times [2023-11-25 00:08:10,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:10,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026898534] [2023-11-25 00:08:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:10,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-25 00:08:11,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:11,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026898534] [2023-11-25 00:08:11,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026898534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:11,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119153774] [2023-11-25 00:08:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:11,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:11,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:11,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:11,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:08:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:11,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:11,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:11,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:11,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119153774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:11,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:11,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-25 00:08:11,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765744663] [2023-11-25 00:08:11,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:11,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:11,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:11,996 INFO L87 Difference]: Start difference. First operand 23741 states and 30913 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2023-11-25 00:08:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:13,143 INFO L93 Difference]: Finished difference Result 55775 states and 73651 transitions. [2023-11-25 00:08:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:13,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 [2023-11-25 00:08:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:13,205 INFO L225 Difference]: With dead ends: 55775 [2023-11-25 00:08:13,206 INFO L226 Difference]: Without dead ends: 34609 [2023-11-25 00:08:13,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:13,224 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:13,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 52 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:08:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34609 states. [2023-11-25 00:08:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34609 to 34037. [2023-11-25 00:08:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34037 states, 34036 states have (on average 1.3218650840286754) internal successors, (44991), 34036 states have internal predecessors, (44991), 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) [2023-11-25 00:08:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34037 states to 34037 states and 44991 transitions. [2023-11-25 00:08:13,979 INFO L78 Accepts]: Start accepts. Automaton has 34037 states and 44991 transitions. Word has length 209 [2023-11-25 00:08:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:13,979 INFO L495 AbstractCegarLoop]: Abstraction has 34037 states and 44991 transitions. [2023-11-25 00:08:13,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2023-11-25 00:08:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 34037 states and 44991 transitions. [2023-11-25 00:08:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-25 00:08:14,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:14,012 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:14,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:14,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-25 00:08:14,220 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:14,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash -837121408, now seen corresponding path program 1 times [2023-11-25 00:08:14,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107517041] [2023-11-25 00:08:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:14,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-25 00:08:14,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107517041] [2023-11-25 00:08:14,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107517041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:14,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:14,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:08:14,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134451149] [2023-11-25 00:08:14,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:14,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:08:14,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:14,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:08:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:08:14,776 INFO L87 Difference]: Start difference. First operand 34037 states and 44991 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:08:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:16,416 INFO L93 Difference]: Finished difference Result 64498 states and 85498 transitions. [2023-11-25 00:08:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:08:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2023-11-25 00:08:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:16,451 INFO L225 Difference]: With dead ends: 64498 [2023-11-25 00:08:16,451 INFO L226 Difference]: Without dead ends: 34037 [2023-11-25 00:08:16,467 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 [2023-11-25 00:08:16,468 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 249 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:16,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 75 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-25 00:08:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34037 states. [2023-11-25 00:08:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34037 to 33036. [2023-11-25 00:08:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33036 states, 33035 states have (on average 1.326048130770395) internal successors, (43806), 33035 states have internal predecessors, (43806), 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) [2023-11-25 00:08:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33036 states to 33036 states and 43806 transitions. [2023-11-25 00:08:17,106 INFO L78 Accepts]: Start accepts. Automaton has 33036 states and 43806 transitions. Word has length 217 [2023-11-25 00:08:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:17,107 INFO L495 AbstractCegarLoop]: Abstraction has 33036 states and 43806 transitions. [2023-11-25 00:08:17,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:08:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 33036 states and 43806 transitions. [2023-11-25 00:08:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-25 00:08:17,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:17,147 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-25 00:08:17,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:17,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1963320209, now seen corresponding path program 1 times [2023-11-25 00:08:17,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:17,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085447550] [2023-11-25 00:08:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:17,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:08:17,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:17,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085447550] [2023-11-25 00:08:17,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085447550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:17,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113796578] [2023-11-25 00:08:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:17,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:17,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:17,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:17,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:08:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:18,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:08:18,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-25 00:08:18,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113796578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:18,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-25 00:08:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15862645] [2023-11-25 00:08:18,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:18,307 INFO L87 Difference]: Start difference. First operand 33036 states and 43806 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2023-11-25 00:08:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:19,014 INFO L93 Difference]: Finished difference Result 60637 states and 80320 transitions. [2023-11-25 00:08:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 224 [2023-11-25 00:08:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:19,053 INFO L225 Difference]: With dead ends: 60637 [2023-11-25 00:08:19,053 INFO L226 Difference]: Without dead ends: 31177 [2023-11-25 00:08:19,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:19,073 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:19,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:08:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31177 states. [2023-11-25 00:08:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31177 to 30891. [2023-11-25 00:08:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30891 states, 30890 states have (on average 1.304208481709291) internal successors, (40287), 30890 states have internal predecessors, (40287), 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) [2023-11-25 00:08:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30891 states to 30891 states and 40287 transitions. [2023-11-25 00:08:19,605 INFO L78 Accepts]: Start accepts. Automaton has 30891 states and 40287 transitions. Word has length 224 [2023-11-25 00:08:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:19,605 INFO L495 AbstractCegarLoop]: Abstraction has 30891 states and 40287 transitions. [2023-11-25 00:08:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2023-11-25 00:08:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 30891 states and 40287 transitions. [2023-11-25 00:08:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-25 00:08:19,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:19,633 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:19,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:08:19,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-25 00:08:19,840 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:19,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1239675667, now seen corresponding path program 1 times [2023-11-25 00:08:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445577451] [2023-11-25 00:08:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:08:20,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445577451] [2023-11-25 00:08:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445577451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:20,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:20,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:08:20,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031808376] [2023-11-25 00:08:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:08:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:08:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:08:20,465 INFO L87 Difference]: Start difference. First operand 30891 states and 40287 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2023-11-25 00:08:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:21,800 INFO L93 Difference]: Finished difference Result 61352 states and 80610 transitions. [2023-11-25 00:08:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:08:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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 229 [2023-11-25 00:08:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:21,832 INFO L225 Difference]: With dead ends: 61352 [2023-11-25 00:08:21,832 INFO L226 Difference]: Without dead ends: 31749 [2023-11-25 00:08:21,842 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 [2023-11-25 00:08:21,843 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 357 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:21,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 11 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-25 00:08:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31749 states. [2023-11-25 00:08:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31749 to 29747. [2023-11-25 00:08:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29747 states, 29746 states have (on average 1.2819202581859745) internal successors, (38132), 29746 states have internal predecessors, (38132), 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) [2023-11-25 00:08:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29747 states to 29747 states and 38132 transitions. [2023-11-25 00:08:22,367 INFO L78 Accepts]: Start accepts. Automaton has 29747 states and 38132 transitions. Word has length 229 [2023-11-25 00:08:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:22,368 INFO L495 AbstractCegarLoop]: Abstraction has 29747 states and 38132 transitions. [2023-11-25 00:08:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2023-11-25 00:08:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 29747 states and 38132 transitions. [2023-11-25 00:08:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-25 00:08:22,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:22,415 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-25 00:08:22,416 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:22,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash -692992845, now seen corresponding path program 1 times [2023-11-25 00:08:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295291863] [2023-11-25 00:08:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:22,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-25 00:08:23,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295291863] [2023-11-25 00:08:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295291863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885473277] [2023-11-25 00:08:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:23,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:23,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:23,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:23,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:08:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:23,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:23,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-25 00:08:23,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885473277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-25 00:08:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298490654] [2023-11-25 00:08:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:23,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:23,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:23,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:23,756 INFO L87 Difference]: Start difference. First operand 29747 states and 38132 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-25 00:08:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:24,844 INFO L93 Difference]: Finished difference Result 56919 states and 73529 transitions. [2023-11-25 00:08:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:24,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 268 [2023-11-25 00:08:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:24,892 INFO L225 Difference]: With dead ends: 56919 [2023-11-25 00:08:24,892 INFO L226 Difference]: Without dead ends: 30319 [2023-11-25 00:08:24,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:24,910 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:24,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 231 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:08:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30319 states. [2023-11-25 00:08:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30319 to 29461. [2023-11-25 00:08:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29461 states, 29460 states have (on average 1.253326544467074) internal successors, (36923), 29460 states have internal predecessors, (36923), 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) [2023-11-25 00:08:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29461 states to 29461 states and 36923 transitions. [2023-11-25 00:08:25,507 INFO L78 Accepts]: Start accepts. Automaton has 29461 states and 36923 transitions. Word has length 268 [2023-11-25 00:08:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:25,508 INFO L495 AbstractCegarLoop]: Abstraction has 29461 states and 36923 transitions. [2023-11-25 00:08:25,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-25 00:08:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 29461 states and 36923 transitions. [2023-11-25 00:08:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-11-25 00:08:25,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:25,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:25,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-25 00:08:25,751 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:25,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1887482124, now seen corresponding path program 1 times [2023-11-25 00:08:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721074945] [2023-11-25 00:08:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 100 proven. 6 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2023-11-25 00:08:26,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:26,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721074945] [2023-11-25 00:08:26,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721074945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:26,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952400379] [2023-11-25 00:08:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:26,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:26,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:26,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:08:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:26,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:26,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-11-25 00:08:26,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952400379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:26,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:26,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-25 00:08:26,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578682301] [2023-11-25 00:08:26,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:26,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:26,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:26,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:26,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:26,902 INFO L87 Difference]: Start difference. First operand 29461 states and 36923 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2023-11-25 00:08:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:28,058 INFO L93 Difference]: Finished difference Result 61066 states and 77161 transitions. [2023-11-25 00:08:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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 298 [2023-11-25 00:08:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:28,094 INFO L225 Difference]: With dead ends: 61066 [2023-11-25 00:08:28,094 INFO L226 Difference]: Without dead ends: 32607 [2023-11-25 00:08:28,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:28,110 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 136 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:28,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 85 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-25 00:08:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32607 states. [2023-11-25 00:08:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32607 to 29890. [2023-11-25 00:08:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29890 states, 29889 states have (on average 1.1811703302218208) internal successors, (35304), 29889 states have internal predecessors, (35304), 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) [2023-11-25 00:08:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29890 states to 29890 states and 35304 transitions. [2023-11-25 00:08:28,618 INFO L78 Accepts]: Start accepts. Automaton has 29890 states and 35304 transitions. Word has length 298 [2023-11-25 00:08:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:28,618 INFO L495 AbstractCegarLoop]: Abstraction has 29890 states and 35304 transitions. [2023-11-25 00:08:28,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2023-11-25 00:08:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29890 states and 35304 transitions. [2023-11-25 00:08:28,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-25 00:08:28,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:28,640 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:28,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:28,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b6be329-afe3-4b6f-bc13-614c46e154b1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-25 00:08:28,841 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:28,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2119103295, now seen corresponding path program 1 times [2023-11-25 00:08:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:28,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116817902] [2023-11-25 00:08:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:28,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat