./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/psyco/psyco_abp_1-1.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_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/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_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/psyco/psyco_abp_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/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_f098e8c8-947f-4f10-bfd6-b367db3b697d/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 39adc6d5c92d5d4be7746cac0afbcc96f3b450588f18f3eb2d03a3ab1e20a3ef --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:46,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:46,258 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:48:46,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:46,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:46,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:46,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:46,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:46,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:46,317 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:46,317 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:46,318 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:46,318 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:46,320 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:46,320 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:46,321 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:46,321 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:46,322 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:46,322 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:46,323 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:46,323 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:46,324 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:46,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:46,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:46,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:48:46,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:46,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:48:46,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:46,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:46,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:46,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:46,329 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:48:46,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:46,330 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:46,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:46,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:46,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:46,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:46,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:46,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:46,332 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:46,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:46,332 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:46,332 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:46,333 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:46,333 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_f098e8c8-947f-4f10-bfd6-b367db3b697d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39adc6d5c92d5d4be7746cac0afbcc96f3b450588f18f3eb2d03a3ab1e20a3ef [2023-11-12 00:48:46,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:46,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:46,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:46,637 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:46,638 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:46,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/psyco/psyco_abp_1-1.c [2023-11-12 00:48:49,800 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:50,181 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:50,183 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/sv-benchmarks/c/psyco/psyco_abp_1-1.c [2023-11-12 00:48:50,220 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/data/6fed5f284/7dbea1cfe55e4905a02fd79643a6cac0/FLAGe3a9f8508 [2023-11-12 00:48:50,235 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/data/6fed5f284/7dbea1cfe55e4905a02fd79643a6cac0 [2023-11-12 00:48:50,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:50,241 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:50,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:50,243 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:50,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:50,250 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6f3072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50, skipping insertion in model container [2023-11-12 00:48:50,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,296 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:50,591 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_f098e8c8-947f-4f10-bfd6-b367db3b697d/sv-benchmarks/c/psyco/psyco_abp_1-1.c[24818,24831] [2023-11-12 00:48:50,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:50,613 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:50,699 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_f098e8c8-947f-4f10-bfd6-b367db3b697d/sv-benchmarks/c/psyco/psyco_abp_1-1.c[24818,24831] [2023-11-12 00:48:50,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:50,727 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:50,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50 WrapperNode [2023-11-12 00:48:50,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:50,730 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:50,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:50,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:50,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,752 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,818 INFO L138 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 457 [2023-11-12 00:48:50,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:50,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:50,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:50,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:50,831 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,878 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:50,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:50,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:50,934 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:50,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:50,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:50,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:51,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:51,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:51,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:51,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:51,151 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:51,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:52,074 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:52,101 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:52,101 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:48:52,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:52 BoogieIcfgContainer [2023-11-12 00:48:52,104 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:52,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:52,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:52,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:52,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:50" (1/3) ... [2023-11-12 00:48:52,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7bd094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:52, skipping insertion in model container [2023-11-12 00:48:52,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (2/3) ... [2023-11-12 00:48:52,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7bd094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:52, skipping insertion in model container [2023-11-12 00:48:52,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:52" (3/3) ... [2023-11-12 00:48:52,114 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2023-11-12 00:48:52,133 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:52,133 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:52,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:52,192 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;@7d9d1855, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:52,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 106 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:48:52,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:52,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:52,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:52,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1655152119, now seen corresponding path program 1 times [2023-11-12 00:48:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637383883] [2023-11-12 00:48:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:52,384 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 00:48:52,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:52,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637383883] [2023-11-12 00:48:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637383883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:52,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:52,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:52,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419479692] [2023-11-12 00:48:52,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:52,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:48:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:48:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:52,434 INFO L87 Difference]: Start difference. First operand has 107 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 106 states have internal predecessors, (207), 0 states have call successors, (0), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:52,474 INFO L93 Difference]: Finished difference Result 213 states and 413 transitions. [2023-11-12 00:48:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:48:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-11-12 00:48:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:52,487 INFO L225 Difference]: With dead ends: 213 [2023-11-12 00:48:52,487 INFO L226 Difference]: Without dead ends: 104 [2023-11-12 00:48:52,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:52,494 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:52,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 199 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-12 00:48:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-12 00:48:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.6893203883495145) internal successors, (174), 103 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 174 transitions. [2023-11-12 00:48:52,540 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 174 transitions. Word has length 8 [2023-11-12 00:48:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:52,541 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 174 transitions. [2023-11-12 00:48:52,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 174 transitions. [2023-11-12 00:48:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:48:52,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:52,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:52,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:48:52,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:52,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash 762379355, now seen corresponding path program 1 times [2023-11-12 00:48:52,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:52,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133814190] [2023-11-12 00:48:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:52,660 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 00:48:52,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:52,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133814190] [2023-11-12 00:48:52,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133814190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:52,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235027749] [2023-11-12 00:48:52,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:52,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:52,666 INFO L87 Difference]: Start difference. First operand 104 states and 174 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:52,720 INFO L93 Difference]: Finished difference Result 210 states and 351 transitions. [2023-11-12 00:48:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-12 00:48:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:52,723 INFO L225 Difference]: With dead ends: 210 [2023-11-12 00:48:52,723 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 00:48:52,724 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 00:48:52,726 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:52,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 323 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 00:48:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-12 00:48:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.669811320754717) internal successors, (177), 106 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 177 transitions. [2023-11-12 00:48:52,740 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 177 transitions. Word has length 9 [2023-11-12 00:48:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:52,740 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 177 transitions. [2023-11-12 00:48:52,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:52,741 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 177 transitions. [2023-11-12 00:48:52,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:48:52,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:52,742 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:52,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:48:52,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:52,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash -197013714, now seen corresponding path program 1 times [2023-11-12 00:48:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595731601] [2023-11-12 00:48:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:52,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:53,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595731601] [2023-11-12 00:48:53,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595731601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:53,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:53,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:48:53,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278505608] [2023-11-12 00:48:53,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:53,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:48:53,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:48:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:48:53,704 INFO L87 Difference]: Start difference. First operand 107 states and 177 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:54,096 INFO L93 Difference]: Finished difference Result 218 states and 355 transitions. [2023-11-12 00:48:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:48:54,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-11-12 00:48:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:54,104 INFO L225 Difference]: With dead ends: 218 [2023-11-12 00:48:54,106 INFO L226 Difference]: Without dead ends: 194 [2023-11-12 00:48:54,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:48:54,110 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 153 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:54,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 518 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:48:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-12 00:48:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2023-11-12 00:48:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.6571428571428573) internal successors, (290), 175 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 290 transitions. [2023-11-12 00:48:54,152 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 290 transitions. Word has length 14 [2023-11-12 00:48:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:54,153 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 290 transitions. [2023-11-12 00:48:54,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 290 transitions. [2023-11-12 00:48:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:48:54,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:54,156 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:54,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:48:54,157 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:54,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash 938789430, now seen corresponding path program 1 times [2023-11-12 00:48:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824604257] [2023-11-12 00:48:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:54,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:54,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824604257] [2023-11-12 00:48:54,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824604257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:54,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:54,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:48:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711923801] [2023-11-12 00:48:54,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:54,218 INFO L87 Difference]: Start difference. First operand 176 states and 290 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:54,257 INFO L93 Difference]: Finished difference Result 302 states and 496 transitions. [2023-11-12 00:48:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2023-11-12 00:48:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:54,259 INFO L225 Difference]: With dead ends: 302 [2023-11-12 00:48:54,260 INFO L226 Difference]: Without dead ends: 128 [2023-11-12 00:48:54,264 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 00:48:54,273 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 32 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:54,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 295 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-12 00:48:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2023-11-12 00:48:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.624) internal successors, (203), 125 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 203 transitions. [2023-11-12 00:48:54,293 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 203 transitions. Word has length 15 [2023-11-12 00:48:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:54,294 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 203 transitions. [2023-11-12 00:48:54,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 203 transitions. [2023-11-12 00:48:54,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:48:54,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:54,298 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:54,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:48:54,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:54,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1693191315, now seen corresponding path program 1 times [2023-11-12 00:48:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102902879] [2023-11-12 00:48:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:48:54,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:54,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102902879] [2023-11-12 00:48:54,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102902879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:54,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:54,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:48:54,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411889976] [2023-11-12 00:48:54,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:54,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:48:54,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:48:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:48:54,393 INFO L87 Difference]: Start difference. First operand 126 states and 203 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:54,436 INFO L93 Difference]: Finished difference Result 257 states and 414 transitions. [2023-11-12 00:48:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:48:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 20 [2023-11-12 00:48:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:54,438 INFO L225 Difference]: With dead ends: 257 [2023-11-12 00:48:54,438 INFO L226 Difference]: Without dead ends: 133 [2023-11-12 00:48:54,439 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 00:48:54,442 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 34 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:54,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 294 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:48:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-12 00:48:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2023-11-12 00:48:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.6) internal successors, (208), 130 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 208 transitions. [2023-11-12 00:48:54,470 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 208 transitions. Word has length 20 [2023-11-12 00:48:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:54,470 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 208 transitions. [2023-11-12 00:48:54,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:48:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 208 transitions. [2023-11-12 00:48:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:48:54,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:54,474 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:54,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:48:54,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:54,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1475234708, now seen corresponding path program 1 times [2023-11-12 00:48:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:54,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266579721] [2023-11-12 00:48:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:54,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:54,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266579721] [2023-11-12 00:48:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266579721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:48:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577156255] [2023-11-12 00:48:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:48:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:54,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:48:54,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:48:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:54,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:48:54,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:48:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:54,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:48:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:48:54,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577156255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:48:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381273592] [2023-11-12 00:48:54,825 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-12 00:48:54,826 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:48:54,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:48:54,838 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:48:54,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:48:57,253 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:00,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1381273592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:00,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:00,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4, 4] total 18 [2023-11-12 00:49:00,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165673178] [2023-11-12 00:49:00,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:00,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 00:49:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 00:49:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:49:00,775 INFO L87 Difference]: Start difference. First operand 131 states and 208 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:02,230 INFO L93 Difference]: Finished difference Result 183 states and 278 transitions. [2023-11-12 00:49:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:49:02,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 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 22 [2023-11-12 00:49:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:02,232 INFO L225 Difference]: With dead ends: 183 [2023-11-12 00:49:02,233 INFO L226 Difference]: Without dead ends: 178 [2023-11-12 00:49:02,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:49:02,234 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 83 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:02,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 548 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 00:49:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-12 00:49:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2023-11-12 00:49:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5654761904761905) internal successors, (263), 168 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2023-11-12 00:49:02,243 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 22 [2023-11-12 00:49:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:02,243 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2023-11-12 00:49:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2023-11-12 00:49:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:49:02,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:02,245 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:02,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:02,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:49:02,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:02,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1500920786, now seen corresponding path program 1 times [2023-11-12 00:49:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562951818] [2023-11-12 00:49:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:02,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:02,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:02,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562951818] [2023-11-12 00:49:02,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562951818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:02,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070072942] [2023-11-12 00:49:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:02,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:02,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:02,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:49:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:02,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:49:02,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:02,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070072942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:03,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545471854] [2023-11-12 00:49:03,159 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-12 00:49:03,159 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:03,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:03,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:03,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:04,706 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:08,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [545471854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:08,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:08,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [5, 4, 6] total 24 [2023-11-12 00:49:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347844820] [2023-11-12 00:49:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:08,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:49:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:49:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:49:08,095 INFO L87 Difference]: Start difference. First operand 169 states and 263 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:09,217 INFO L93 Difference]: Finished difference Result 177 states and 270 transitions. [2023-11-12 00:49:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:49:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 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 23 [2023-11-12 00:49:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:09,219 INFO L225 Difference]: With dead ends: 177 [2023-11-12 00:49:09,220 INFO L226 Difference]: Without dead ends: 175 [2023-11-12 00:49:09,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:49:09,221 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 110 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:09,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 526 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:49:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-12 00:49:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2023-11-12 00:49:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5621301775147929) internal successors, (264), 169 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 264 transitions. [2023-11-12 00:49:09,229 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 264 transitions. Word has length 23 [2023-11-12 00:49:09,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:09,229 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 264 transitions. [2023-11-12 00:49:09,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 264 transitions. [2023-11-12 00:49:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:49:09,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:09,231 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:09,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:09,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:49:09,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:09,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1119927614, now seen corresponding path program 1 times [2023-11-12 00:49:09,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:09,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452131403] [2023-11-12 00:49:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:09,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:09,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452131403] [2023-11-12 00:49:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452131403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260467644] [2023-11-12 00:49:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:09,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:09,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:09,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:49:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:09,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:49:09,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:09,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260467644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338558864] [2023-11-12 00:49:09,689 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-12 00:49:09,690 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:09,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:09,691 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:09,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:11,065 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:15,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1338558864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:15,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:15,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 21 [2023-11-12 00:49:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315262124] [2023-11-12 00:49:15,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 00:49:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 00:49:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:49:15,043 INFO L87 Difference]: Start difference. First operand 170 states and 264 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:16,902 INFO L93 Difference]: Finished difference Result 177 states and 269 transitions. [2023-11-12 00:49:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 00:49:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 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 25 [2023-11-12 00:49:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:16,904 INFO L225 Difference]: With dead ends: 177 [2023-11-12 00:49:16,904 INFO L226 Difference]: Without dead ends: 174 [2023-11-12 00:49:16,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:49:16,905 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 68 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:16,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 546 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-12 00:49:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-12 00:49:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2023-11-12 00:49:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5562130177514792) internal successors, (263), 169 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 263 transitions. [2023-11-12 00:49:16,913 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 263 transitions. Word has length 25 [2023-11-12 00:49:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:16,913 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 263 transitions. [2023-11-12 00:49:16,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 263 transitions. [2023-11-12 00:49:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:49:16,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:16,915 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:16,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:49:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:17,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:17,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash 369462614, now seen corresponding path program 1 times [2023-11-12 00:49:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995273355] [2023-11-12 00:49:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:17,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995273355] [2023-11-12 00:49:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995273355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596780393] [2023-11-12 00:49:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:17,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:17,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:17,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:17,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:49:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:17,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:49:17,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:17,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596780393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:17,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624814997] [2023-11-12 00:49:17,736 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-12 00:49:17,736 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:17,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:17,737 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:17,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:19,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1624814997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:23,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:23,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [5, 4, 6] total 26 [2023-11-12 00:49:23,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118364600] [2023-11-12 00:49:23,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 00:49:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 00:49:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:49:23,567 INFO L87 Difference]: Start difference. First operand 170 states and 263 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:24,704 INFO L93 Difference]: Finished difference Result 174 states and 266 transitions. [2023-11-12 00:49:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 00:49:24,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 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 26 [2023-11-12 00:49:24,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:24,707 INFO L225 Difference]: With dead ends: 174 [2023-11-12 00:49:24,707 INFO L226 Difference]: Without dead ends: 171 [2023-11-12 00:49:24,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:49:24,708 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 97 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:24,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 510 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:49:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-12 00:49:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2023-11-12 00:49:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5502958579881656) internal successors, (262), 169 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 262 transitions. [2023-11-12 00:49:24,716 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 262 transitions. Word has length 26 [2023-11-12 00:49:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:24,717 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 262 transitions. [2023-11-12 00:49:24,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 262 transitions. [2023-11-12 00:49:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:49:24,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:24,719 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:24,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:24,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:24,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:24,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1554530707, now seen corresponding path program 1 times [2023-11-12 00:49:24,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:24,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817748497] [2023-11-12 00:49:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:24,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:49:24,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:24,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817748497] [2023-11-12 00:49:24,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817748497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:24,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:24,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:24,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719646432] [2023-11-12 00:49:24,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:24,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:24,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:24,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:24,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:24,976 INFO L87 Difference]: Start difference. First operand 170 states and 262 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:25,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:25,018 INFO L93 Difference]: Finished difference Result 262 states and 410 transitions. [2023-11-12 00:49:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:25,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 29 [2023-11-12 00:49:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:25,020 INFO L225 Difference]: With dead ends: 262 [2023-11-12 00:49:25,020 INFO L226 Difference]: Without dead ends: 133 [2023-11-12 00:49:25,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:25,022 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 69 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:25,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 202 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:49:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-12 00:49:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2023-11-12 00:49:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.5307692307692307) internal successors, (199), 130 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 199 transitions. [2023-11-12 00:49:25,028 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 199 transitions. Word has length 29 [2023-11-12 00:49:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:25,028 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 199 transitions. [2023-11-12 00:49:25,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 199 transitions. [2023-11-12 00:49:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:49:25,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:25,030 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:25,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:49:25,030 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:25,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:25,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2135712591, now seen corresponding path program 1 times [2023-11-12 00:49:25,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:25,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100420842] [2023-11-12 00:49:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:25,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:49:25,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:25,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100420842] [2023-11-12 00:49:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100420842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:25,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858166180] [2023-11-12 00:49:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:25,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:25,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:25,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:49:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:25,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:49:25,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:49:25,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:49:25,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858166180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:25,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1814733850] [2023-11-12 00:49:25,876 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:49:25,876 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:25,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:25,877 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:25,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:27,776 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:30,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4648#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0) (exists ((|v_ULTIMATE.start_main_#t~nondet32#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet32#1_13| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet32#1_13| 2147483647) (not (= |v_ULTIMATE.start_main_#t~nondet32#1_13| 0)))) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 0) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P1~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= |ULTIMATE.start_main_~q~0#1| 4) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (= 2 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647))' at error location [2023-11-12 00:49:30,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:49:30,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:30,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 13 [2023-11-12 00:49:30,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358423475] [2023-11-12 00:49:30,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:49:30,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:49:30,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:49:30,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:49:30,282 INFO L87 Difference]: Start difference. First operand 131 states and 199 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:30,957 INFO L93 Difference]: Finished difference Result 468 states and 716 transitions. [2023-11-12 00:49:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:49:30,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 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 32 [2023-11-12 00:49:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:30,961 INFO L225 Difference]: With dead ends: 468 [2023-11-12 00:49:30,961 INFO L226 Difference]: Without dead ends: 346 [2023-11-12 00:49:30,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 00:49:30,963 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 572 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:30,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 1027 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:49:30,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-12 00:49:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 281. [2023-11-12 00:49:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.5714285714285714) internal successors, (440), 280 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 440 transitions. [2023-11-12 00:49:30,974 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 440 transitions. Word has length 32 [2023-11-12 00:49:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:30,974 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 440 transitions. [2023-11-12 00:49:30,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 440 transitions. [2023-11-12 00:49:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 00:49:30,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:30,976 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-12 00:49:30,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:49:31,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:31,186 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:31,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1771134383, now seen corresponding path program 1 times [2023-11-12 00:49:31,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:31,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241651352] [2023-11-12 00:49:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:49:31,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:31,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241651352] [2023-11-12 00:49:31,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241651352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:31,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775834411] [2023-11-12 00:49:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:31,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:31,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:31,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:49:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:31,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:49:31,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:49:31,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:49:31,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775834411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:31,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391222783] [2023-11-12 00:49:31,434 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-12 00:49:31,434 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:31,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:31,434 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:31,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:33,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:35,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5635#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 0 (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2)) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (= 3 |ULTIMATE.start_main_~method_id~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= |ULTIMATE.start_main_~P1~0#1| 0) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_#t~nondet33#1_13| Int)) (and (<= |v_ULTIMATE.start_main_#t~nondet33#1_13| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet33#1_13| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet33#1_13| 0)))) (not (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= |ULTIMATE.start_main_~q~0#1| 4) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (= |ULTIMATE.start_main_~P3~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647))' at error location [2023-11-12 00:49:35,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:49:35,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:35,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-12 00:49:35,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319802871] [2023-11-12 00:49:35,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:49:35,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:35,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:35,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:49:35,671 INFO L87 Difference]: Start difference. First operand 281 states and 440 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:35,797 INFO L93 Difference]: Finished difference Result 373 states and 584 transitions. [2023-11-12 00:49:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:49:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 33 [2023-11-12 00:49:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:35,803 INFO L225 Difference]: With dead ends: 373 [2023-11-12 00:49:35,803 INFO L226 Difference]: Without dead ends: 351 [2023-11-12 00:49:35,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:49:35,805 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 230 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:35,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 441 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:49:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-12 00:49:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2023-11-12 00:49:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.528735632183908) internal successors, (532), 348 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 532 transitions. [2023-11-12 00:49:35,816 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 532 transitions. Word has length 33 [2023-11-12 00:49:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:35,817 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 532 transitions. [2023-11-12 00:49:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 532 transitions. [2023-11-12 00:49:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 00:49:35,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:35,818 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-12 00:49:35,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:49:36,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:36,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -886789566, now seen corresponding path program 1 times [2023-11-12 00:49:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:36,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56260383] [2023-11-12 00:49:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:36,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:36,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56260383] [2023-11-12 00:49:36,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56260383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:36,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449583032] [2023-11-12 00:49:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:36,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:36,517 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:36,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:49:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:36,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:49:36,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:36,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:49:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:36,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449583032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:49:36,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730337748] [2023-11-12 00:49:36,990 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 00:49:36,990 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:49:36,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:49:36,991 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:49:36,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:49:38,560 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:49:41,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6604#(and (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 1) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (or (and (<= 0 |ULTIMATE.start_main_~P6~0#1|) (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 1) (not (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1))) (and (<= 0 |ULTIMATE.start_main_~P6~0#1|) (or (not (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 1)) (< |ULTIMATE.start_main_~this_expect~0#1| 0)) (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 1))) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= |ULTIMATE.start_main_~q~0#1| 4) (exists ((|v_ULTIMATE.start_main_#t~nondet35#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet35#1_13| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet35#1_13| 0)) (<= |v_ULTIMATE.start_main_#t~nondet35#1_13| 2147483647))) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~P1~0#1|) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647))' at error location [2023-11-12 00:49:41,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:49:41,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:49:41,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2023-11-12 00:49:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786092188] [2023-11-12 00:49:41,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:49:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:49:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:49:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:49:41,683 INFO L87 Difference]: Start difference. First operand 349 states and 532 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:41,893 INFO L93 Difference]: Finished difference Result 376 states and 564 transitions. [2023-11-12 00:49:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:49:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 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 35 [2023-11-12 00:49:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:41,896 INFO L225 Difference]: With dead ends: 376 [2023-11-12 00:49:41,896 INFO L226 Difference]: Without dead ends: 374 [2023-11-12 00:49:41,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:49:41,897 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 140 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:41,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 888 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:49:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-12 00:49:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 349. [2023-11-12 00:49:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.5258620689655173) internal successors, (531), 348 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 531 transitions. [2023-11-12 00:49:41,912 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 531 transitions. Word has length 35 [2023-11-12 00:49:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:41,913 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 531 transitions. [2023-11-12 00:49:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:49:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 531 transitions. [2023-11-12 00:49:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-12 00:49:41,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:41,915 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-12 00:49:41,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f098e8c8-947f-4f10-bfd6-b367db3b697d/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0