./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label36.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 62e9241ba979767c8bca2756b2edfc882f7b20aa81fc6f783856c8cd54d80552 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:50,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:50,909 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:48:50,916 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:50,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:50,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:50,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:50,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:50,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:50,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:50,964 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:50,965 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:50,965 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:50,967 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:50,967 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:50,968 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:50,968 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:50,969 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:50,969 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:50,970 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:50,970 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:50,971 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:50,972 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:50,972 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:50,973 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:48:50,973 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:50,973 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:48:50,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:50,974 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:50,975 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:50,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:50,976 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:48:50,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:50,977 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:50,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:50,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:50,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:50,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:50,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:50,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:50,979 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:50,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:50,980 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:50,980 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:50,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:50,981 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_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62e9241ba979767c8bca2756b2edfc882f7b20aa81fc6f783856c8cd54d80552 [2023-11-12 00:48:51,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:51,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:51,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:51,272 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:51,272 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:51,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2023-11-12 00:48:54,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:54,835 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:54,836 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2023-11-12 00:48:54,858 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/data/8a613782e/e4677a2956094687b841caaad1e4bdfd/FLAG372d8b684 [2023-11-12 00:48:54,876 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/data/8a613782e/e4677a2956094687b841caaad1e4bdfd [2023-11-12 00:48:54,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:54,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:54,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:54,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:54,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:54,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:54" (1/1) ... [2023-11-12 00:48:54,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b3a24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:54, skipping insertion in model container [2023-11-12 00:48:54,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:54" (1/1) ... [2023-11-12 00:48:55,001 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:55,673 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_579c9091-6088-4a4b-b2e5-38a210da09c2/sv-benchmarks/c/eca-rers2012/Problem03_label36.c[58393,58406] [2023-11-12 00:48:55,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:55,728 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:55,987 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_579c9091-6088-4a4b-b2e5-38a210da09c2/sv-benchmarks/c/eca-rers2012/Problem03_label36.c[58393,58406] [2023-11-12 00:48:56,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:56,022 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:56,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56 WrapperNode [2023-11-12 00:48:56,023 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:56,024 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:56,024 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:56,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:56,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,208 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-12 00:48:56,209 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:56,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:56,210 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:56,210 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:56,220 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,231 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,294 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,356 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:56,358 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:56,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:56,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:56,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (1/1) ... [2023-11-12 00:48:56,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:56,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:56,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:56,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:56,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:56,520 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:56,522 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:58,829 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:59,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:59,321 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:48:59,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:59 BoogieIcfgContainer [2023-11-12 00:48:59,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:59,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:59,328 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:59,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:59,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:54" (1/3) ... [2023-11-12 00:48:59,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521d9349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:59, skipping insertion in model container [2023-11-12 00:48:59,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:56" (2/3) ... [2023-11-12 00:48:59,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521d9349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:59, skipping insertion in model container [2023-11-12 00:48:59,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:59" (3/3) ... [2023-11-12 00:48:59,335 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label36.c [2023-11-12 00:48:59,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:59,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:59,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:59,440 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;@74f5e898, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:59,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:59,448 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) [2023-11-12 00:48:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-12 00:48:59,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:59,467 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] [2023-11-12 00:48:59,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:59,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1724860424, now seen corresponding path program 1 times [2023-11-12 00:48:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:59,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215644189] [2023-11-12 00:48:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:00,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:00,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215644189] [2023-11-12 00:49:00,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215644189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:00,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:00,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:00,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596324640] [2023-11-12 00:49:00,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:00,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:00,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:00,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:00,780 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) [2023-11-12 00:49:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:02,116 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-12 00:49:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:02,120 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 [2023-11-12 00:49:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:02,149 INFO L225 Difference]: With dead ends: 440 [2023-11-12 00:49:02,149 INFO L226 Difference]: Without dead ends: 289 [2023-11-12 00:49:02,155 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 [2023-11-12 00:49:02,160 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:02,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 00:49:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-12 00:49:02,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-12 00:49:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2023-11-12 00:49:02,262 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2023-11-12 00:49:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:02,267 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2023-11-12 00:49:02,268 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) [2023-11-12 00:49:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2023-11-12 00:49:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-12 00:49:02,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:02,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:02,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:49:02,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:02,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1817676695, now seen corresponding path program 1 times [2023-11-12 00:49:02,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:02,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242948267] [2023-11-12 00:49:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:02,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:02,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242948267] [2023-11-12 00:49:02,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242948267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:02,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:02,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:02,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365904762] [2023-11-12 00:49:02,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:02,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:02,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:02,661 INFO L87 Difference]: Start difference. First operand 289 states and 515 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:03,686 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2023-11-12 00:49:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-12 00:49:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:03,693 INFO L225 Difference]: With dead ends: 863 [2023-11-12 00:49:03,693 INFO L226 Difference]: Without dead ends: 575 [2023-11-12 00:49:03,696 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 [2023-11-12 00:49:03,703 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:03,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:49:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-12 00:49:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-12 00:49:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7421602787456445) internal successors, (1000), 574 states have internal predecessors, (1000), 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) [2023-11-12 00:49:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1000 transitions. [2023-11-12 00:49:03,755 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1000 transitions. Word has length 151 [2023-11-12 00:49:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:03,755 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1000 transitions. [2023-11-12 00:49:03,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1000 transitions. [2023-11-12 00:49:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-12 00:49:03,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:03,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:03,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:49:03,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:03,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash 733016954, now seen corresponding path program 1 times [2023-11-12 00:49:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475134251] [2023-11-12 00:49:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:04,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:04,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475134251] [2023-11-12 00:49:04,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475134251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:04,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:04,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:04,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242802464] [2023-11-12 00:49:04,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:04,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:04,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:04,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:04,786 INFO L87 Difference]: Start difference. First operand 575 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:06,150 INFO L93 Difference]: Finished difference Result 1290 states and 2262 transitions. [2023-11-12 00:49:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:49:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2023-11-12 00:49:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:06,156 INFO L225 Difference]: With dead ends: 1290 [2023-11-12 00:49:06,156 INFO L226 Difference]: Without dead ends: 575 [2023-11-12 00:49:06,161 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 [2023-11-12 00:49:06,163 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 219 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:06,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 11 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 00:49:06,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-12 00:49:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-12 00:49:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.519163763066202) internal successors, (872), 574 states have internal predecessors, (872), 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) [2023-11-12 00:49:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 872 transitions. [2023-11-12 00:49:06,190 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 872 transitions. Word has length 158 [2023-11-12 00:49:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:06,191 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 872 transitions. [2023-11-12 00:49:06,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 872 transitions. [2023-11-12 00:49:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-12 00:49:06,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:06,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:06,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:49:06,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:06,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2058061037, now seen corresponding path program 1 times [2023-11-12 00:49:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:06,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489781540] [2023-11-12 00:49:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:06,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:06,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489781540] [2023-11-12 00:49:06,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489781540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:06,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:06,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:06,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327787460] [2023-11-12 00:49:06,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:06,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:06,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:06,828 INFO L87 Difference]: Start difference. First operand 575 states and 872 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:07,694 INFO L93 Difference]: Finished difference Result 1723 states and 2614 transitions. [2023-11-12 00:49:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:07,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2023-11-12 00:49:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:07,704 INFO L225 Difference]: With dead ends: 1723 [2023-11-12 00:49:07,704 INFO L226 Difference]: Without dead ends: 1149 [2023-11-12 00:49:07,706 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 [2023-11-12 00:49:07,707 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:07,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 12 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:49:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2023-11-12 00:49:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2023-11-12 00:49:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.506108202443281) internal successors, (1726), 1146 states have internal predecessors, (1726), 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) [2023-11-12 00:49:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1726 transitions. [2023-11-12 00:49:07,782 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1726 transitions. Word has length 166 [2023-11-12 00:49:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:07,782 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1726 transitions. [2023-11-12 00:49:07,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1726 transitions. [2023-11-12 00:49:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-12 00:49:07,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:07,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:49:07,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:07,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1145013059, now seen corresponding path program 1 times [2023-11-12 00:49:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:07,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091617079] [2023-11-12 00:49:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:08,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:08,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091617079] [2023-11-12 00:49:08,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091617079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:08,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:08,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:08,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203599882] [2023-11-12 00:49:08,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:08,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:08,093 INFO L87 Difference]: Start difference. First operand 1147 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2023-11-12 00:49:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:09,017 INFO L93 Difference]: Finished difference Result 3439 states and 5176 transitions. [2023-11-12 00:49:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:09,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 [2023-11-12 00:49:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:09,035 INFO L225 Difference]: With dead ends: 3439 [2023-11-12 00:49:09,035 INFO L226 Difference]: Without dead ends: 2293 [2023-11-12 00:49:09,038 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 [2023-11-12 00:49:09,040 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 131 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:09,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 72 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:49:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2023-11-12 00:49:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2023-11-12 00:49:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.485589519650655) internal successors, (3402), 2290 states have internal predecessors, (3402), 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) [2023-11-12 00:49:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3402 transitions. [2023-11-12 00:49:09,157 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3402 transitions. Word has length 169 [2023-11-12 00:49:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:09,158 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3402 transitions. [2023-11-12 00:49:09,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2023-11-12 00:49:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3402 transitions. [2023-11-12 00:49:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-12 00:49:09,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:09,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:09,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:49:09,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:09,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:09,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1836474018, now seen corresponding path program 1 times [2023-11-12 00:49:09,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:09,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406310981] [2023-11-12 00:49:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:09,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:09,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:09,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406310981] [2023-11-12 00:49:09,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406310981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:09,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:09,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:09,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317700064] [2023-11-12 00:49:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:09,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:09,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:09,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:09,809 INFO L87 Difference]: Start difference. First operand 2291 states and 3402 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2023-11-12 00:49:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:10,837 INFO L93 Difference]: Finished difference Result 6869 states and 10203 transitions. [2023-11-12 00:49:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:10,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 171 [2023-11-12 00:49:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:10,877 INFO L225 Difference]: With dead ends: 6869 [2023-11-12 00:49:10,878 INFO L226 Difference]: Without dead ends: 4579 [2023-11-12 00:49:10,883 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 [2023-11-12 00:49:10,887 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:10,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 45 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:49:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2023-11-12 00:49:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4579. [2023-11-12 00:49:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 1.453473132372215) internal successors, (6654), 4578 states have internal predecessors, (6654), 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) [2023-11-12 00:49:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6654 transitions. [2023-11-12 00:49:11,061 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6654 transitions. Word has length 171 [2023-11-12 00:49:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:11,062 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 6654 transitions. [2023-11-12 00:49:11,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2023-11-12 00:49:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6654 transitions. [2023-11-12 00:49:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-12 00:49:11,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:11,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:11,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:49:11,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:11,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash 284031865, now seen corresponding path program 1 times [2023-11-12 00:49:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833541346] [2023-11-12 00:49:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:11,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:11,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833541346] [2023-11-12 00:49:11,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833541346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:11,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:11,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707566711] [2023-11-12 00:49:11,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:11,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:11,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:11,670 INFO L87 Difference]: Start difference. First operand 4579 states and 6654 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2023-11-12 00:49:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:12,709 INFO L93 Difference]: Finished difference Result 13163 states and 19138 transitions. [2023-11-12 00:49:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 173 [2023-11-12 00:49:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:12,762 INFO L225 Difference]: With dead ends: 13163 [2023-11-12 00:49:12,762 INFO L226 Difference]: Without dead ends: 8585 [2023-11-12 00:49:12,770 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 [2023-11-12 00:49:12,774 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 128 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:12,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 60 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:49:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2023-11-12 00:49:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8583. [2023-11-12 00:49:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.4469820554649266) internal successors, (12418), 8582 states have internal predecessors, (12418), 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) [2023-11-12 00:49:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 12418 transitions. [2023-11-12 00:49:13,079 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 12418 transitions. Word has length 173 [2023-11-12 00:49:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:13,080 INFO L495 AbstractCegarLoop]: Abstraction has 8583 states and 12418 transitions. [2023-11-12 00:49:13,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2023-11-12 00:49:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 12418 transitions. [2023-11-12 00:49:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-12 00:49:13,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:13,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:13,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:49:13,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:13,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:13,098 INFO L85 PathProgramCache]: Analyzing trace with hash 354461945, now seen corresponding path program 1 times [2023-11-12 00:49:13,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:13,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300523436] [2023-11-12 00:49:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:13,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 00:49:13,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300523436] [2023-11-12 00:49:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300523436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:13,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:13,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264215640] [2023-11-12 00:49:13,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:13,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:13,598 INFO L87 Difference]: Start difference. First operand 8583 states and 12418 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 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) [2023-11-12 00:49:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:14,672 INFO L93 Difference]: Finished difference Result 21455 states and 30953 transitions. [2023-11-12 00:49:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 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 176 [2023-11-12 00:49:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:14,743 INFO L225 Difference]: With dead ends: 21455 [2023-11-12 00:49:14,743 INFO L226 Difference]: Without dead ends: 12873 [2023-11-12 00:49:14,757 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 [2023-11-12 00:49:14,758 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:14,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 19 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:49:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12873 states. [2023-11-12 00:49:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12873 to 12873. [2023-11-12 00:49:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 12872 states have (on average 1.4260410192666253) internal successors, (18356), 12872 states have internal predecessors, (18356), 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) [2023-11-12 00:49:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 18356 transitions. [2023-11-12 00:49:15,233 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 18356 transitions. Word has length 176 [2023-11-12 00:49:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:15,233 INFO L495 AbstractCegarLoop]: Abstraction has 12873 states and 18356 transitions. [2023-11-12 00:49:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 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) [2023-11-12 00:49:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 18356 transitions. [2023-11-12 00:49:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-12 00:49:15,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:15,258 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:15,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:49:15,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:15,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:15,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1321191210, now seen corresponding path program 1 times [2023-11-12 00:49:15,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:15,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120069583] [2023-11-12 00:49:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:15,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:15,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:15,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120069583] [2023-11-12 00:49:15,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120069583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:15,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:15,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:15,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337963477] [2023-11-12 00:49:15,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:15,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:15,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:15,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:15,678 INFO L87 Difference]: Start difference. First operand 12873 states and 18356 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 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) [2023-11-12 00:49:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:16,711 INFO L93 Difference]: Finished difference Result 28891 states and 41309 transitions. [2023-11-12 00:49:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 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 178 [2023-11-12 00:49:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:16,754 INFO L225 Difference]: With dead ends: 28891 [2023-11-12 00:49:16,754 INFO L226 Difference]: Without dead ends: 16019 [2023-11-12 00:49:16,775 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 [2023-11-12 00:49:16,777 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:16,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 212 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:49:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2023-11-12 00:49:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 16019. [2023-11-12 00:49:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16019 states, 16018 states have (on average 1.378886252965414) internal successors, (22087), 16018 states have internal predecessors, (22087), 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) [2023-11-12 00:49:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16019 states to 16019 states and 22087 transitions. [2023-11-12 00:49:17,192 INFO L78 Accepts]: Start accepts. Automaton has 16019 states and 22087 transitions. Word has length 178 [2023-11-12 00:49:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:17,193 INFO L495 AbstractCegarLoop]: Abstraction has 16019 states and 22087 transitions. [2023-11-12 00:49:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 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) [2023-11-12 00:49:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 16019 states and 22087 transitions. [2023-11-12 00:49:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 00:49:17,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:17,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:17,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:49:17,218 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:17,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:17,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1381035560, now seen corresponding path program 1 times [2023-11-12 00:49:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:17,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995259072] [2023-11-12 00:49:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:17,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:49:17,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995259072] [2023-11-12 00:49:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995259072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:17,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:17,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:17,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689062517] [2023-11-12 00:49:17,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:17,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:17,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:17,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:17,796 INFO L87 Difference]: Start difference. First operand 16019 states and 22087 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2023-11-12 00:49:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:18,805 INFO L93 Difference]: Finished difference Result 36756 states and 50605 transitions. [2023-11-12 00:49:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:18,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 188 [2023-11-12 00:49:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:18,855 INFO L225 Difference]: With dead ends: 36756 [2023-11-12 00:49:18,855 INFO L226 Difference]: Without dead ends: 20738 [2023-11-12 00:49:18,877 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 [2023-11-12 00:49:18,878 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:18,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 60 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:49:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20738 states. [2023-11-12 00:49:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20738 to 20738. [2023-11-12 00:49:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20738 states, 20737 states have (on average 1.3513526546752181) internal successors, (28023), 20737 states have internal predecessors, (28023), 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) [2023-11-12 00:49:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20738 states to 20738 states and 28023 transitions. [2023-11-12 00:49:19,301 INFO L78 Accepts]: Start accepts. Automaton has 20738 states and 28023 transitions. Word has length 188 [2023-11-12 00:49:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:19,301 INFO L495 AbstractCegarLoop]: Abstraction has 20738 states and 28023 transitions. [2023-11-12 00:49:19,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2023-11-12 00:49:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 20738 states and 28023 transitions. [2023-11-12 00:49:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-12 00:49:19,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:19,330 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:19,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:49:19,330 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:19,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash -270743515, now seen corresponding path program 1 times [2023-11-12 00:49:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:19,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34442722] [2023-11-12 00:49:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:49:19,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:19,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34442722] [2023-11-12 00:49:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34442722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441061394] [2023-11-12 00:49:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:19,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:19,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:19,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:49:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:20,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:49:20,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:49:20,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441061394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:20,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-12 00:49:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658511303] [2023-11-12 00:49:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:20,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:20,324 INFO L87 Difference]: Start difference. First operand 20738 states and 28023 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) [2023-11-12 00:49:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:21,468 INFO L93 Difference]: Finished difference Result 46909 states and 63931 transitions. [2023-11-12 00:49:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:21,469 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 195 [2023-11-12 00:49:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:21,526 INFO L225 Difference]: With dead ends: 46909 [2023-11-12 00:49:21,527 INFO L226 Difference]: Without dead ends: 26315 [2023-11-12 00:49:21,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:21,549 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 136 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:21,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 65 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:49:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26315 states. [2023-11-12 00:49:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26315 to 26315. [2023-11-12 00:49:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26315 states, 26314 states have (on average 1.2202249752983203) internal successors, (32109), 26314 states have internal predecessors, (32109), 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) [2023-11-12 00:49:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26315 states to 26315 states and 32109 transitions. [2023-11-12 00:49:22,102 INFO L78 Accepts]: Start accepts. Automaton has 26315 states and 32109 transitions. Word has length 195 [2023-11-12 00:49:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:22,103 INFO L495 AbstractCegarLoop]: Abstraction has 26315 states and 32109 transitions. [2023-11-12 00:49:22,103 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) [2023-11-12 00:49:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 26315 states and 32109 transitions. [2023-11-12 00:49:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-12 00:49:22,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:22,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:22,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:22,337 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:22,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1583359125, now seen corresponding path program 1 times [2023-11-12 00:49:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:22,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538106417] [2023-11-12 00:49:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:49:22,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:22,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538106417] [2023-11-12 00:49:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538106417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:22,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:22,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:22,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225774123] [2023-11-12 00:49:22,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:22,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:22,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:22,870 INFO L87 Difference]: Start difference. First operand 26315 states and 32109 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) [2023-11-12 00:49:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:23,768 INFO L93 Difference]: Finished difference Result 55920 states and 67969 transitions. [2023-11-12 00:49:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:23,769 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 205 [2023-11-12 00:49:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:23,840 INFO L225 Difference]: With dead ends: 55920 [2023-11-12 00:49:23,841 INFO L226 Difference]: Without dead ends: 30035 [2023-11-12 00:49:23,856 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 [2023-11-12 00:49:23,857 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 120 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:23,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 75 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:49:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30035 states. [2023-11-12 00:49:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30035 to 30033. [2023-11-12 00:49:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30033 states, 30032 states have (on average 1.2083111347895579) internal successors, (36288), 30032 states have internal predecessors, (36288), 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) [2023-11-12 00:49:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30033 states to 30033 states and 36288 transitions. [2023-11-12 00:49:24,372 INFO L78 Accepts]: Start accepts. Automaton has 30033 states and 36288 transitions. Word has length 205 [2023-11-12 00:49:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:24,372 INFO L495 AbstractCegarLoop]: Abstraction has 30033 states and 36288 transitions. [2023-11-12 00:49:24,372 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) [2023-11-12 00:49:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 30033 states and 36288 transitions. [2023-11-12 00:49:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-12 00:49:24,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:24,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:49:24,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:24,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1791334084, now seen corresponding path program 1 times [2023-11-12 00:49:24,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:24,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019805242] [2023-11-12 00:49:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:24,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:25,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:25,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019805242] [2023-11-12 00:49:25,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019805242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:25,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:25,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:25,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269674510] [2023-11-12 00:49:25,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:25,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:25,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:25,365 INFO L87 Difference]: Start difference. First operand 30033 states and 36288 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2023-11-12 00:49:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:26,328 INFO L93 Difference]: Finished difference Result 58778 states and 71158 transitions. [2023-11-12 00:49:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 [2023-11-12 00:49:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:26,406 INFO L225 Difference]: With dead ends: 58778 [2023-11-12 00:49:26,406 INFO L226 Difference]: Without dead ends: 30176 [2023-11-12 00:49:26,426 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 [2023-11-12 00:49:26,427 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:26,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:49:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30176 states. [2023-11-12 00:49:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30176 to 30176. [2023-11-12 00:49:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30176 states, 30175 states have (on average 1.2075227837613918) internal successors, (36437), 30175 states have internal predecessors, (36437), 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) [2023-11-12 00:49:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30176 states to 30176 states and 36437 transitions. [2023-11-12 00:49:27,066 INFO L78 Accepts]: Start accepts. Automaton has 30176 states and 36437 transitions. Word has length 217 [2023-11-12 00:49:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:27,066 INFO L495 AbstractCegarLoop]: Abstraction has 30176 states and 36437 transitions. [2023-11-12 00:49:27,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2023-11-12 00:49:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 30176 states and 36437 transitions. [2023-11-12 00:49:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-12 00:49:27,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:27,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:27,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:49:27,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:27,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1783146724, now seen corresponding path program 1 times [2023-11-12 00:49:27,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:27,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827453245] [2023-11-12 00:49:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:27,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:27,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827453245] [2023-11-12 00:49:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827453245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094331140] [2023-11-12 00:49:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:27,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:27,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:49:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:27,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:49:27,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:49:28,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:28,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094331140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:28,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:49:28,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628057368] [2023-11-12 00:49:28,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:28,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:28,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:28,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:28,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:28,403 INFO L87 Difference]: Start difference. First operand 30176 states and 36437 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2023-11-12 00:49:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:29,499 INFO L93 Difference]: Finished difference Result 58206 states and 70431 transitions. [2023-11-12 00:49:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 243 [2023-11-12 00:49:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:29,552 INFO L225 Difference]: With dead ends: 58206 [2023-11-12 00:49:29,553 INFO L226 Difference]: Without dead ends: 28889 [2023-11-12 00:49:29,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:29,576 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:29,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 237 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:49:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28889 states. [2023-11-12 00:49:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28889 to 28889. [2023-11-12 00:49:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28889 states, 28888 states have (on average 1.1948559955690945) internal successors, (34517), 28888 states have internal predecessors, (34517), 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) [2023-11-12 00:49:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28889 states to 28889 states and 34517 transitions. [2023-11-12 00:49:30,213 INFO L78 Accepts]: Start accepts. Automaton has 28889 states and 34517 transitions. Word has length 243 [2023-11-12 00:49:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:30,213 INFO L495 AbstractCegarLoop]: Abstraction has 28889 states and 34517 transitions. [2023-11-12 00:49:30,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2023-11-12 00:49:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28889 states and 34517 transitions. [2023-11-12 00:49:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-12 00:49:30,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:30,240 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:30,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:30,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 00:49:30,446 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:30,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:30,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1061545544, now seen corresponding path program 1 times [2023-11-12 00:49:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203973144] [2023-11-12 00:49:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:30,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:31,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:31,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203973144] [2023-11-12 00:49:31,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203973144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020568362] [2023-11-12 00:49:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:31,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:31,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:31,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:31,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:49:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:31,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:49:31,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:49:31,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020568362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:31,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:31,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:49:31,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233769314] [2023-11-12 00:49:31,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:31,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:31,655 INFO L87 Difference]: Start difference. First operand 28889 states and 34517 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2023-11-12 00:49:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:32,582 INFO L93 Difference]: Finished difference Result 55346 states and 66974 transitions. [2023-11-12 00:49:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 249 [2023-11-12 00:49:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:32,622 INFO L225 Difference]: With dead ends: 55346 [2023-11-12 00:49:32,622 INFO L226 Difference]: Without dead ends: 30748 [2023-11-12 00:49:32,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:32,637 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:32,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 175 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:49:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30748 states. [2023-11-12 00:49:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30748 to 30748. [2023-11-12 00:49:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30748 states, 30747 states have (on average 1.2000845610953914) internal successors, (36899), 30747 states have internal predecessors, (36899), 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) [2023-11-12 00:49:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30748 states to 30748 states and 36899 transitions. [2023-11-12 00:49:33,076 INFO L78 Accepts]: Start accepts. Automaton has 30748 states and 36899 transitions. Word has length 249 [2023-11-12 00:49:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:33,076 INFO L495 AbstractCegarLoop]: Abstraction has 30748 states and 36899 transitions. [2023-11-12 00:49:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2023-11-12 00:49:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 30748 states and 36899 transitions. [2023-11-12 00:49:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-12 00:49:33,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:33,090 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:33,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:49:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:49:33,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:33,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1952880410, now seen corresponding path program 1 times [2023-11-12 00:49:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:33,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015728092] [2023-11-12 00:49:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:33,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-12 00:49:33,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:33,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015728092] [2023-11-12 00:49:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015728092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283406805] [2023-11-12 00:49:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:33,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:33,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579c9091-6088-4a4b-b2e5-38a210da09c2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:49:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:33,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:49:33,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-12 00:49:34,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283406805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:34,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:49:34,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201516164] [2023-11-12 00:49:34,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:34,241 INFO L87 Difference]: Start difference. First operand 30748 states and 36899 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) 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) [2023-11-12 00:49:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:35,287 INFO L93 Difference]: Finished difference Result 59779 states and 71770 transitions. [2023-11-12 00:49:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:35,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) 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 252 [2023-11-12 00:49:35,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted.