./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label46.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_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/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_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/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_d3ce0aab-16a8-4f91-a2c1-65519157f680/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 6c9ef72945147e4ae81caf50df56c252d6632fa10df84ba86d26e6872e2ab991 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:11:16,801 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:11:16,916 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:11:16,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:11:16,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:11:16,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:11:16,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:11:16,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:11:16,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:11:16,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:11:16,964 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:11:16,965 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:11:16,966 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:11:16,966 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:11:16,967 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:11:16,968 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:11:16,969 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:11:16,969 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:11:16,970 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:11:16,971 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:11:16,971 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:11:16,972 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:11:16,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:11:16,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:11:16,974 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:11:16,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:11:16,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:11:16,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:11:16,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:11:16,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:11:16,983 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:11:16,984 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:11:16,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:11:16,985 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:11:16,985 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:11:16,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:11:16,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:11:16,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:11:16,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:11:16,987 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:11:16,987 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:11:16,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:11:16,988 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:11:16,989 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:11:16,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:11:16,989 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_d3ce0aab-16a8-4f91-a2c1-65519157f680/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c9ef72945147e4ae81caf50df56c252d6632fa10df84ba86d26e6872e2ab991 [2023-11-12 00:11:17,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:11:17,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:11:17,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:11:17,351 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:11:17,352 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:11:17,356 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/eca-rers2012/Problem02_label46.c [2023-11-12 00:11:20,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:11:21,220 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:11:21,220 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/sv-benchmarks/c/eca-rers2012/Problem02_label46.c [2023-11-12 00:11:21,252 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/data/4bf375858/912e4d054b4c4558a9b7d7fc3829fbf3/FLAG89f833a8f [2023-11-12 00:11:21,269 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/data/4bf375858/912e4d054b4c4558a9b7d7fc3829fbf3 [2023-11-12 00:11:21,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:11:21,283 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:11:21,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:11:21,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:11:21,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:11:21,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:11:21" (1/1) ... [2023-11-12 00:11:21,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f23317f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:21, skipping insertion in model container [2023-11-12 00:11:21,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:11:21" (1/1) ... [2023-11-12 00:11:21,384 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:11:21,772 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_d3ce0aab-16a8-4f91-a2c1-65519157f680/sv-benchmarks/c/eca-rers2012/Problem02_label46.c[18150,18163] [2023-11-12 00:11:21,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:11:21,841 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:11:21,963 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_d3ce0aab-16a8-4f91-a2c1-65519157f680/sv-benchmarks/c/eca-rers2012/Problem02_label46.c[18150,18163] [2023-11-12 00:11:21,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:11:22,008 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:11:22,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22 WrapperNode [2023-11-12 00:11:22,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:11:22,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:11:22,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:11:22,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:11:22,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,137 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 669 [2023-11-12 00:11:22,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:11:22,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:11:22,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:11:22,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:11:22,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,169 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,206 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,222 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,243 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:11:22,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:11:22,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:11:22,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:11:22,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (1/1) ... [2023-11-12 00:11:22,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:11:22,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:22,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:11:22,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:11:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:11:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:11:22,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:11:22,471 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:11:22,474 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:11:23,647 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:11:24,154 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:11:24,155 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:11:24,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:11:24 BoogieIcfgContainer [2023-11-12 00:11:24,161 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:11:24,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:11:24,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:11:24,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:11:24,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:11:21" (1/3) ... [2023-11-12 00:11:24,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9006dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:11:24, skipping insertion in model container [2023-11-12 00:11:24,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:11:22" (2/3) ... [2023-11-12 00:11:24,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9006dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:11:24, skipping insertion in model container [2023-11-12 00:11:24,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:11:24" (3/3) ... [2023-11-12 00:11:24,178 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label46.c [2023-11-12 00:11:24,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:11:24,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:11:24,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:11:24,285 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;@8720e31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:11:24,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:11:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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 00:11:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-12 00:11:24,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:24,310 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] [2023-11-12 00:11:24,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:24,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1814579479, now seen corresponding path program 1 times [2023-11-12 00:11:24,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:24,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436439759] [2023-11-12 00:11:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:25,070 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 00:11:25,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436439759] [2023-11-12 00:11:25,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436439759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:25,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:25,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:25,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961275595] [2023-11-12 00:11:25,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:25,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:25,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:25,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:25,151 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 00:11:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:25,980 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2023-11-12 00:11:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2023-11-12 00:11:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:26,007 INFO L225 Difference]: With dead ends: 251 [2023-11-12 00:11:26,007 INFO L226 Difference]: Without dead ends: 163 [2023-11-12 00:11:26,012 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 00:11:26,019 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:26,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 65 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:11:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-12 00:11:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-12 00:11:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5617283950617284) internal successors, (253), 162 states have internal predecessors, (253), 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 00:11:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 253 transitions. [2023-11-12 00:11:26,128 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 253 transitions. Word has length 80 [2023-11-12 00:11:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:26,131 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 253 transitions. [2023-11-12 00:11:26,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 00:11:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 253 transitions. [2023-11-12 00:11:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-12 00:11:26,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:26,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:26,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:11:26,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:26,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash -483701446, now seen corresponding path program 1 times [2023-11-12 00:11:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:26,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003760764] [2023-11-12 00:11:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:26,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:26,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003760764] [2023-11-12 00:11:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003760764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168148503] [2023-11-12 00:11:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:26,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:26,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:26,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:26,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:11:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:26,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:26,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:11:26,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168148503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-12 00:11:26,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176054411] [2023-11-12 00:11:26,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:26,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:26,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:26,962 INFO L87 Difference]: Start difference. First operand 163 states and 253 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 00:11:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:27,441 INFO L93 Difference]: Finished difference Result 485 states and 756 transitions. [2023-11-12 00:11:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 85 [2023-11-12 00:11:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:27,446 INFO L225 Difference]: With dead ends: 485 [2023-11-12 00:11:27,447 INFO L226 Difference]: Without dead ends: 323 [2023-11-12 00:11:27,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:27,451 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:27,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 20 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-12 00:11:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2023-11-12 00:11:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5) internal successors, (483), 322 states have internal predecessors, (483), 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 00:11:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 483 transitions. [2023-11-12 00:11:27,476 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 483 transitions. Word has length 85 [2023-11-12 00:11:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:27,478 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 483 transitions. [2023-11-12 00:11:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 00:11:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 483 transitions. [2023-11-12 00:11:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-12 00:11:27,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:27,486 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:11:27,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:27,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:27,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:27,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1659811025, now seen corresponding path program 1 times [2023-11-12 00:11:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:27,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854364978] [2023-11-12 00:11:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:27,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:27,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:27,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854364978] [2023-11-12 00:11:27,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854364978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:27,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:27,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791656482] [2023-11-12 00:11:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:27,965 INFO L87 Difference]: Start difference. First operand 323 states and 483 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 00:11:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:28,549 INFO L93 Difference]: Finished difference Result 805 states and 1261 transitions. [2023-11-12 00:11:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2023-11-12 00:11:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:28,556 INFO L225 Difference]: With dead ends: 805 [2023-11-12 00:11:28,556 INFO L226 Difference]: Without dead ends: 483 [2023-11-12 00:11:28,560 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 00:11:28,565 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 78 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:28,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 138 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-12 00:11:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2023-11-12 00:11:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.3983402489626555) internal successors, (674), 482 states have internal predecessors, (674), 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 00:11:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 674 transitions. [2023-11-12 00:11:28,603 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 674 transitions. Word has length 89 [2023-11-12 00:11:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:28,603 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 674 transitions. [2023-11-12 00:11:28,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 00:11:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 674 transitions. [2023-11-12 00:11:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:11:28,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:28,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:11:28,609 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:28,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:28,610 INFO L85 PathProgramCache]: Analyzing trace with hash -80522247, now seen corresponding path program 1 times [2023-11-12 00:11:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:28,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415225212] [2023-11-12 00:11:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:28,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:28,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:28,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415225212] [2023-11-12 00:11:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415225212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:28,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:28,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:28,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294979811] [2023-11-12 00:11:28,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:28,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:28,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:28,848 INFO L87 Difference]: Start difference. First operand 483 states and 674 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 00:11:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:29,387 INFO L93 Difference]: Finished difference Result 1285 states and 1834 transitions. [2023-11-12 00:11:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 93 [2023-11-12 00:11:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:29,395 INFO L225 Difference]: With dead ends: 1285 [2023-11-12 00:11:29,395 INFO L226 Difference]: Without dead ends: 803 [2023-11-12 00:11:29,396 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 00:11:29,398 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:29,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 147 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-12 00:11:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2023-11-12 00:11:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.3017456359102244) internal successors, (1044), 802 states have internal predecessors, (1044), 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 00:11:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1044 transitions. [2023-11-12 00:11:29,436 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1044 transitions. Word has length 93 [2023-11-12 00:11:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:29,436 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1044 transitions. [2023-11-12 00:11:29,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 00:11:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1044 transitions. [2023-11-12 00:11:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-12 00:11:29,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:29,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:29,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:11:29,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:29,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:29,441 INFO L85 PathProgramCache]: Analyzing trace with hash 703490294, now seen corresponding path program 1 times [2023-11-12 00:11:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:29,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612962561] [2023-11-12 00:11:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:11:29,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:29,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612962561] [2023-11-12 00:11:29,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612962561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:29,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:29,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:29,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594774952] [2023-11-12 00:11:29,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:29,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:29,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:29,534 INFO L87 Difference]: Start difference. First operand 803 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 00:11:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:30,006 INFO L93 Difference]: Finished difference Result 2085 states and 2754 transitions. [2023-11-12 00:11:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 95 [2023-11-12 00:11:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:30,015 INFO L225 Difference]: With dead ends: 2085 [2023-11-12 00:11:30,015 INFO L226 Difference]: Without dead ends: 1283 [2023-11-12 00:11:30,017 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 00:11:30,018 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:30,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 32 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2023-11-12 00:11:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2023-11-12 00:11:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.2644305772230888) internal successors, (1621), 1282 states have internal predecessors, (1621), 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 00:11:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1621 transitions. [2023-11-12 00:11:30,058 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1621 transitions. Word has length 95 [2023-11-12 00:11:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:30,059 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 1621 transitions. [2023-11-12 00:11:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 00:11:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1621 transitions. [2023-11-12 00:11:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-12 00:11:30,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:30,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:30,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:11:30,065 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:30,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:30,066 INFO L85 PathProgramCache]: Analyzing trace with hash -985386589, now seen corresponding path program 1 times [2023-11-12 00:11:30,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:30,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544302851] [2023-11-12 00:11:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:30,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:30,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:30,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544302851] [2023-11-12 00:11:30,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544302851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:30,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482677517] [2023-11-12 00:11:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:30,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:30,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:30,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:11:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:30,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:30,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:11:30,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482677517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:30,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:30,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-12 00:11:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719921536] [2023-11-12 00:11:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:30,830 INFO L87 Difference]: Start difference. First operand 1283 states and 1621 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 00:11:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:31,323 INFO L93 Difference]: Finished difference Result 3205 states and 4139 transitions. [2023-11-12 00:11:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 107 [2023-11-12 00:11:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:31,334 INFO L225 Difference]: With dead ends: 3205 [2023-11-12 00:11:31,335 INFO L226 Difference]: Without dead ends: 1203 [2023-11-12 00:11:31,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:31,339 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:31,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2023-11-12 00:11:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2023-11-12 00:11:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.2279534109816972) internal successors, (1476), 1202 states have internal predecessors, (1476), 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 00:11:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1476 transitions. [2023-11-12 00:11:31,382 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1476 transitions. Word has length 107 [2023-11-12 00:11:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:31,383 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1476 transitions. [2023-11-12 00:11:31,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 00:11:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1476 transitions. [2023-11-12 00:11:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-12 00:11:31,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:31,388 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2023-11-12 00:11:31,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:11:31,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:31,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1426744713, now seen corresponding path program 1 times [2023-11-12 00:11:31,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:31,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126195435] [2023-11-12 00:11:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:31,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:11:31,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:31,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126195435] [2023-11-12 00:11:31,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126195435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:31,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:31,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:31,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602973607] [2023-11-12 00:11:31,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:31,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:31,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:31,742 INFO L87 Difference]: Start difference. First operand 1203 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 00:11:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:32,201 INFO L93 Difference]: Finished difference Result 2405 states and 2951 transitions. [2023-11-12 00:11:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 114 [2023-11-12 00:11:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:32,210 INFO L225 Difference]: With dead ends: 2405 [2023-11-12 00:11:32,211 INFO L226 Difference]: Without dead ends: 1203 [2023-11-12 00:11:32,213 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 00:11:32,216 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:32,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 14 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2023-11-12 00:11:32,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1203. [2023-11-12 00:11:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.194675540765391) internal successors, (1436), 1202 states have internal predecessors, (1436), 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 00:11:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1436 transitions. [2023-11-12 00:11:32,269 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1436 transitions. Word has length 114 [2023-11-12 00:11:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:32,269 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1436 transitions. [2023-11-12 00:11:32,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 00:11:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1436 transitions. [2023-11-12 00:11:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-12 00:11:32,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:32,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:11:32,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:11:32,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:32,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1413215369, now seen corresponding path program 1 times [2023-11-12 00:11:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:32,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143642058] [2023-11-12 00:11:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:32,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:11:32,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:32,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143642058] [2023-11-12 00:11:32,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143642058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:32,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:32,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739657333] [2023-11-12 00:11:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:32,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:11:32,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:11:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:11:32,685 INFO L87 Difference]: Start difference. First operand 1203 states and 1436 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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 00:11:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:33,375 INFO L93 Difference]: Finished difference Result 2563 states and 3071 transitions. [2023-11-12 00:11:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:11:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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 114 [2023-11-12 00:11:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:33,384 INFO L225 Difference]: With dead ends: 2563 [2023-11-12 00:11:33,384 INFO L226 Difference]: Without dead ends: 1283 [2023-11-12 00:11:33,386 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 00:11:33,387 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 78 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:33,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 39 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:11:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2023-11-12 00:11:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2023-11-12 00:11:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.173946957878315) internal successors, (1505), 1282 states have internal predecessors, (1505), 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 00:11:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1505 transitions. [2023-11-12 00:11:33,478 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1505 transitions. Word has length 114 [2023-11-12 00:11:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:33,480 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 1505 transitions. [2023-11-12 00:11:33,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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 00:11:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1505 transitions. [2023-11-12 00:11:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-12 00:11:33,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:33,489 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2023-11-12 00:11:33,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:11:33,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:33,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash 20771839, now seen corresponding path program 1 times [2023-11-12 00:11:33,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:33,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127897074] [2023-11-12 00:11:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:33,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:11:33,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:33,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127897074] [2023-11-12 00:11:33,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127897074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:33,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:33,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:33,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897030833] [2023-11-12 00:11:33,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:33,622 INFO L87 Difference]: Start difference. First operand 1283 states and 1505 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 00:11:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:34,049 INFO L93 Difference]: Finished difference Result 3045 states and 3653 transitions. [2023-11-12 00:11:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 118 [2023-11-12 00:11:34,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:34,061 INFO L225 Difference]: With dead ends: 3045 [2023-11-12 00:11:34,061 INFO L226 Difference]: Without dead ends: 1603 [2023-11-12 00:11:34,064 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 00:11:34,065 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 68 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:34,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 145 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2023-11-12 00:11:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1603. [2023-11-12 00:11:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 1.181023720349563) internal successors, (1892), 1602 states have internal predecessors, (1892), 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 00:11:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 1892 transitions. [2023-11-12 00:11:34,118 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 1892 transitions. Word has length 118 [2023-11-12 00:11:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:34,119 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 1892 transitions. [2023-11-12 00:11:34,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 00:11:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 1892 transitions. [2023-11-12 00:11:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-12 00:11:34,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:34,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:34,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:11:34,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:34,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -365674049, now seen corresponding path program 1 times [2023-11-12 00:11:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:34,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925148918] [2023-11-12 00:11:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:34,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:34,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925148918] [2023-11-12 00:11:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925148918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920365226] [2023-11-12 00:11:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:34,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:34,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:34,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:11:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:35,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:11:35,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:11:35,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:35,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920365226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:35,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:35,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-12 00:11:35,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698443946] [2023-11-12 00:11:35,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:35,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:35,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:35,189 INFO L87 Difference]: Start difference. First operand 1603 states and 1892 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:35,641 INFO L93 Difference]: Finished difference Result 3445 states and 4084 transitions. [2023-11-12 00:11:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2023-11-12 00:11:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:35,654 INFO L225 Difference]: With dead ends: 3445 [2023-11-12 00:11:35,654 INFO L226 Difference]: Without dead ends: 1843 [2023-11-12 00:11:35,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:11:35,660 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:35,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-11-12 00:11:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1843. [2023-11-12 00:11:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 1.1574375678610207) internal successors, (2132), 1842 states have internal predecessors, (2132), 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 00:11:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2132 transitions. [2023-11-12 00:11:35,727 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2132 transitions. Word has length 154 [2023-11-12 00:11:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:35,728 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2132 transitions. [2023-11-12 00:11:35,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:11:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2132 transitions. [2023-11-12 00:11:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-12 00:11:35,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:35,734 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 00:11:35,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:35,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:11:35,942 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:35,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash 879959639, now seen corresponding path program 1 times [2023-11-12 00:11:35,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:35,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930671216] [2023-11-12 00:11:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:35,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 00:11:36,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:36,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930671216] [2023-11-12 00:11:36,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930671216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:36,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:36,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:11:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496435375] [2023-11-12 00:11:36,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:36,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:11:36,172 INFO L87 Difference]: Start difference. First operand 1843 states and 2132 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 00:11:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:36,651 INFO L93 Difference]: Finished difference Result 4085 states and 4770 transitions. [2023-11-12 00:11:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 157 [2023-11-12 00:11:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:36,666 INFO L225 Difference]: With dead ends: 4085 [2023-11-12 00:11:36,666 INFO L226 Difference]: Without dead ends: 2003 [2023-11-12 00:11:36,690 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 00:11:36,691 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 64 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:36,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 107 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2023-11-12 00:11:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 2003. [2023-11-12 00:11:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 1.1173826173826173) internal successors, (2237), 2002 states have internal predecessors, (2237), 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 00:11:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 2237 transitions. [2023-11-12 00:11:36,757 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 2237 transitions. Word has length 157 [2023-11-12 00:11:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:36,757 INFO L495 AbstractCegarLoop]: Abstraction has 2003 states and 2237 transitions. [2023-11-12 00:11:36,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 00:11:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 2237 transitions. [2023-11-12 00:11:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-12 00:11:36,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:36,763 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:11:36,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:11:36,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:36,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash -360303544, now seen corresponding path program 1 times [2023-11-12 00:11:36,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:36,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075070178] [2023-11-12 00:11:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:36,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 97 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:11:37,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075070178] [2023-11-12 00:11:37,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075070178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796873726] [2023-11-12 00:11:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:37,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:37,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:37,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:37,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:11:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:37,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:11:37,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:11:37,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:37,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796873726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:37,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:37,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-12 00:11:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378925997] [2023-11-12 00:11:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:37,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:11:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:11:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:37,459 INFO L87 Difference]: Start difference. First operand 2003 states and 2237 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 00:11:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:37,917 INFO L93 Difference]: Finished difference Result 4325 states and 4828 transitions. [2023-11-12 00:11:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:11:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 00:11:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:37,931 INFO L225 Difference]: With dead ends: 4325 [2023-11-12 00:11:37,932 INFO L226 Difference]: Without dead ends: 2003 [2023-11-12 00:11:37,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 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 00:11:37,936 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 70 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:37,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 134 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2023-11-12 00:11:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1923. [2023-11-12 00:11:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 1.0972944849115505) internal successors, (2109), 1922 states have internal predecessors, (2109), 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 00:11:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2109 transitions. [2023-11-12 00:11:37,994 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2109 transitions. Word has length 166 [2023-11-12 00:11:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:37,995 INFO L495 AbstractCegarLoop]: Abstraction has 1923 states and 2109 transitions. [2023-11-12 00:11:37,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 00:11:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2109 transitions. [2023-11-12 00:11:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-11-12 00:11:38,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:38,002 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 00:11:38,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:38,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:38,210 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:38,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:38,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1499414967, now seen corresponding path program 1 times [2023-11-12 00:11:38,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:38,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748145704] [2023-11-12 00:11:38,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 221 proven. 79 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 00:11:39,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748145704] [2023-11-12 00:11:39,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748145704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498636403] [2023-11-12 00:11:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:39,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:39,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:39,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:39,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3ce0aab-16a8-4f91-a2c1-65519157f680/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:11:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:39,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:11:39,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 00:11:39,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:11:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 00:11:39,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498636403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:11:39,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982322294] [2023-11-12 00:11:39,694 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-11-12 00:11:39,694 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:11:39,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:11:39,707 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:11:39,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:11:56,966 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-11-12 00:11:57,251 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16296 conjunctions. This might take some time... [2023-11-12 00:11:58,180 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 552 conjunctions. [2023-11-12 00:11:58,184 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-11-12 00:11:58,446 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16296 conjunctions. This might take some time... [2023-11-12 00:11:59,297 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 552 conjunctions. [2023-11-12 00:11:59,319 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2023-11-12 00:11:59,485 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16296 conjunctions. This might take some time... [2023-11-12 00:12:00,338 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 552 conjunctions. [2023-11-12 00:12:00,918 INFO L180 IcfgInterpreter]: Interpretation finished