./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Primes.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/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_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Primes.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/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_a31a1f66-a963-4e53-ab7d-6df9174050da/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 16beca065b3aeb336c54dcf96f3abbe61553e7d28b28c1a40f525ad89a5da56e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:43,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:43,245 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:59:43,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:43,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:43,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:43,292 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:43,293 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:43,294 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:43,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:43,300 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:43,301 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:43,302 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:43,303 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:43,304 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:43,304 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:43,305 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:43,305 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:43,306 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:43,306 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:43,308 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:43,309 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:43,310 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:43,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:43,311 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:59:43,311 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:43,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:59:43,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:43,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:43,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:43,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:43,315 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:59:43,315 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:43,316 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:43,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:43,316 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:43,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:43,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:43,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:43,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:43,318 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:43,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:43,319 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:43,319 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:43,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:43,320 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_a31a1f66-a963-4e53-ab7d-6df9174050da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16beca065b3aeb336c54dcf96f3abbe61553e7d28b28c1a40f525ad89a5da56e [2023-11-12 00:59:43,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:43,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:43,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:43,734 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:43,735 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:43,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/recursive/Primes.c [2023-11-12 00:59:46,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:47,018 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:47,019 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/sv-benchmarks/c/recursive/Primes.c [2023-11-12 00:59:47,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/data/59bd3ef4f/d8d2379e0ed74a18899b830200bd0ea1/FLAG141cab45b [2023-11-12 00:59:47,042 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/data/59bd3ef4f/d8d2379e0ed74a18899b830200bd0ea1 [2023-11-12 00:59:47,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:47,046 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:47,048 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:47,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:47,053 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:47,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6352dfd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47, skipping insertion in model container [2023-11-12 00:59:47,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,082 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:47,256 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_a31a1f66-a963-4e53-ab7d-6df9174050da/sv-benchmarks/c/recursive/Primes.c[2190,2203] [2023-11-12 00:59:47,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:47,282 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:47,304 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_a31a1f66-a963-4e53-ab7d-6df9174050da/sv-benchmarks/c/recursive/Primes.c[2190,2203] [2023-11-12 00:59:47,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:47,320 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:47,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47 WrapperNode [2023-11-12 00:59:47,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:47,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:47,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:47,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:47,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,337 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,360 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-11-12 00:59:47,361 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:47,361 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:47,362 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:47,362 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:47,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,374 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,392 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:47,400 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:47,400 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:47,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:47,401 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (1/1) ... [2023-11-12 00:59:47,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:47,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:47,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure multiple_of [2023-11-12 00:59:47,485 INFO L138 BoogieDeclarations]: Found implementation of procedure multiple_of [2023-11-12 00:59:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2023-11-12 00:59:47,485 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2023-11-12 00:59:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure is_prime_ [2023-11-12 00:59:47,486 INFO L138 BoogieDeclarations]: Found implementation of procedure is_prime_ [2023-11-12 00:59:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:47,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:47,556 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:47,558 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:47,863 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:47,886 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:47,887 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:59:47,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:47 BoogieIcfgContainer [2023-11-12 00:59:47,890 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:47,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:47,893 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:47,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:47,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:47" (1/3) ... [2023-11-12 00:59:47,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdf06c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:47, skipping insertion in model container [2023-11-12 00:59:47,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:47" (2/3) ... [2023-11-12 00:59:47,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdf06c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:47, skipping insertion in model container [2023-11-12 00:59:47,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:47" (3/3) ... [2023-11-12 00:59:47,900 INFO L112 eAbstractionObserver]: Analyzing ICFG Primes.c [2023-11-12 00:59:47,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:47,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:47,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:48,001 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;@712fe8e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:48,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 36 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 00:59:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:59:48,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:48,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:48,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:48,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1349448312, now seen corresponding path program 1 times [2023-11-12 00:59:48,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:48,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446951847] [2023-11-12 00:59:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:48,296 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 00:59:48,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:48,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446951847] [2023-11-12 00:59:48,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446951847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:48,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:48,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:48,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107623627] [2023-11-12 00:59:48,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:48,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:48,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:48,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:48,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:48,351 INFO L87 Difference]: Start difference. First operand has 49 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 36 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:48,399 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2023-11-12 00:59:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-12 00:59:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:48,410 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:59:48,410 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 00:59:48,413 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 00:59:48,417 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:48,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 00:59:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-12 00:59:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 00:59:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2023-11-12 00:59:48,455 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 13 [2023-11-12 00:59:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:48,456 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2023-11-12 00:59:48,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:59:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2023-11-12 00:59:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:59:48,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:48,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:48,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:48,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:48,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1094481281, now seen corresponding path program 1 times [2023-11-12 00:59:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040909242] [2023-11-12 00:59:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:48,766 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 00:59:48,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:48,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040909242] [2023-11-12 00:59:48,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040909242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:48,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:48,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:48,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980666787] [2023-11-12 00:59:48,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:48,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:48,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:48,772 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:59:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:48,839 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2023-11-12 00:59:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-12 00:59:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:48,843 INFO L225 Difference]: With dead ends: 68 [2023-11-12 00:59:48,843 INFO L226 Difference]: Without dead ends: 49 [2023-11-12 00:59:48,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:48,846 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:48,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 296 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-12 00:59:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-12 00:59:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-12 00:59:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-11-12 00:59:48,861 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 20 [2023-11-12 00:59:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:48,863 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-11-12 00:59:48,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:59:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-11-12 00:59:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:59:48,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:48,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:48,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:59:48,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:48,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:48,872 INFO L85 PathProgramCache]: Analyzing trace with hash -306925128, now seen corresponding path program 1 times [2023-11-12 00:59:48,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:48,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072518789] [2023-11-12 00:59:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,066 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 00:59:49,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:49,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072518789] [2023-11-12 00:59:49,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072518789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:49,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:49,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:49,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607654506] [2023-11-12 00:59:49,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:49,071 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:49,126 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-11-12 00:59:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-12 00:59:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:49,129 INFO L225 Difference]: With dead ends: 55 [2023-11-12 00:59:49,130 INFO L226 Difference]: Without dead ends: 51 [2023-11-12 00:59:49,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:49,132 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 4 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:49,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 286 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-12 00:59:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-12 00:59:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-12 00:59:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-11-12 00:59:49,144 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2023-11-12 00:59:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:49,145 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-11-12 00:59:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-11-12 00:59:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:59:49,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:49,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:49,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:59:49,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:49,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -224959538, now seen corresponding path program 1 times [2023-11-12 00:59:49,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:49,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628208958] [2023-11-12 00:59:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,231 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 00:59:49,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:49,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628208958] [2023-11-12 00:59:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628208958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:49,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706039695] [2023-11-12 00:59:49,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:49,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:49,235 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:49,345 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-12 00:59:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:49,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-12 00:59:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:49,349 INFO L225 Difference]: With dead ends: 57 [2023-11-12 00:59:49,353 INFO L226 Difference]: Without dead ends: 53 [2023-11-12 00:59:49,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:49,356 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:49,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 195 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-12 00:59:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-12 00:59:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-12 00:59:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-11-12 00:59:49,381 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 22 [2023-11-12 00:59:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:49,381 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-11-12 00:59:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:59:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-11-12 00:59:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:59:49,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:49,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:49,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:59:49,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:49,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1677803704, now seen corresponding path program 1 times [2023-11-12 00:59:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:49,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428826396] [2023-11-12 00:59:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:59:49,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:49,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428826396] [2023-11-12 00:59:49,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428826396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:49,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766793843] [2023-11-12 00:59:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:49,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:49,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:59:49,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:59:49,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:59:49,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766793843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017172756] [2023-11-12 00:59:49,974 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:59:49,974 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:49,979 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:59:49,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:49,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-11-12 00:59:49,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341943091] [2023-11-12 00:59:49,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:59:49,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:59:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:59:49,983 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:59:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:50,139 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2023-11-12 00:59:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:50,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2023-11-12 00:59:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:50,141 INFO L225 Difference]: With dead ends: 66 [2023-11-12 00:59:50,141 INFO L226 Difference]: Without dead ends: 49 [2023-11-12 00:59:50,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:59:50,143 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:50,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 393 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-12 00:59:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-12 00:59:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-12 00:59:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2023-11-12 00:59:50,151 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 29 [2023-11-12 00:59:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:50,152 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2023-11-12 00:59:50,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-12 00:59:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2023-11-12 00:59:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 00:59:50,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:50,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:50,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:59:50,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:50,360 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:50,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1617599152, now seen corresponding path program 1 times [2023-11-12 00:59:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:50,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704623343] [2023-11-12 00:59:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:59:50,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704623343] [2023-11-12 00:59:50,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704623343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:50,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975613891] [2023-11-12 00:59:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:50,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:50,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:50,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:50,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:50,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:59:50,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:59:50,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:59:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975613891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:51,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611773348] [2023-11-12 00:59:51,253 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:59:51,253 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:51,254 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:59:51,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:51,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2023-11-12 00:59:51,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643808343] [2023-11-12 00:59:51,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:51,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:59:51,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:59:51,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:59:51,259 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-12 00:59:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:51,623 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-11-12 00:59:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 00:59:51,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 30 [2023-11-12 00:59:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:51,626 INFO L225 Difference]: With dead ends: 68 [2023-11-12 00:59:51,626 INFO L226 Difference]: Without dead ends: 52 [2023-11-12 00:59:51,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:59:51,631 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:51,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 580 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-12 00:59:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2023-11-12 00:59:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-12 00:59:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-11-12 00:59:51,653 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 30 [2023-11-12 00:59:51,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:51,653 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-11-12 00:59:51,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-12 00:59:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-11-12 00:59:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:59:51,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:51,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:51,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:51,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:51,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:51,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1287840268, now seen corresponding path program 1 times [2023-11-12 00:59:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825350469] [2023-11-12 00:59:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:59:51,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825350469] [2023-11-12 00:59:52,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825350469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:52,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366673098] [2023-11-12 00:59:52,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:52,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:52,004 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:59:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,054 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2023-11-12 00:59:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-12 00:59:52,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,056 INFO L225 Difference]: With dead ends: 70 [2023-11-12 00:59:52,056 INFO L226 Difference]: Without dead ends: 51 [2023-11-12 00:59:52,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:52,057 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 35 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:52,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 166 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-12 00:59:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-11-12 00:59:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-12 00:59:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-11-12 00:59:52,064 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 32 [2023-11-12 00:59:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,065 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-11-12 00:59:52,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:59:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-11-12 00:59:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:59:52,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:59:52,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:52,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1285376925, now seen corresponding path program 1 times [2023-11-12 00:59:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374556314] [2023-11-12 00:59:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:59:52,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374556314] [2023-11-12 00:59:52,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374556314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:52,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:52,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906738625] [2023-11-12 00:59:52,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:52,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:52,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:52,129 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:59:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,154 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2023-11-12 00:59:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-11-12 00:59:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,156 INFO L225 Difference]: With dead ends: 99 [2023-11-12 00:59:52,162 INFO L226 Difference]: Without dead ends: 53 [2023-11-12 00:59:52,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:52,164 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:52,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-12 00:59:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-12 00:59:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-12 00:59:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-11-12 00:59:52,176 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 50 [2023-11-12 00:59:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,176 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-11-12 00:59:52,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:59:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-11-12 00:59:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:59:52,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:59:52,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:52,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash -68737779, now seen corresponding path program 1 times [2023-11-12 00:59:52,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580988423] [2023-11-12 00:59:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:59:52,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580988423] [2023-11-12 00:59:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580988423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748001617] [2023-11-12 00:59:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:52,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:52,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:52,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:59:52,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:59:52,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748001617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-11-12 00:59:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494660750] [2023-11-12 00:59:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:52,385 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 00:59:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,439 INFO L93 Difference]: Finished difference Result 106 states and 139 transitions. [2023-11-12 00:59:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:52,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2023-11-12 00:59:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,441 INFO L225 Difference]: With dead ends: 106 [2023-11-12 00:59:52,441 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 00:59:52,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:52,443 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:52,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 00:59:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-12 00:59:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-12 00:59:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-11-12 00:59:52,450 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 51 [2023-11-12 00:59:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,450 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-11-12 00:59:52,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 00:59:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-11-12 00:59:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-12 00:59:52,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:52,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:52,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1129977969, now seen corresponding path program 1 times [2023-11-12 00:59:52,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210092477] [2023-11-12 00:59:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:59:52,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210092477] [2023-11-12 00:59:52,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210092477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:52,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:52,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418237466] [2023-11-12 00:59:52,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:52,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:52,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:52,751 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:59:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,778 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2023-11-12 00:59:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:52,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2023-11-12 00:59:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,780 INFO L225 Difference]: With dead ends: 114 [2023-11-12 00:59:52,781 INFO L226 Difference]: Without dead ends: 61 [2023-11-12 00:59:52,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:52,782 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:52,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 199 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-12 00:59:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-11-12 00:59:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.170731707317073) internal successors, (48), 42 states have internal predecessors, (48), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (17), 11 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-12 00:59:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2023-11-12 00:59:52,808 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 56 [2023-11-12 00:59:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,808 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2023-11-12 00:59:52,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:59:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2023-11-12 00:59:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 00:59:52,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:59:52,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:52,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1501667645, now seen corresponding path program 1 times [2023-11-12 00:59:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33253076] [2023-11-12 00:59:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 00:59:52,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33253076] [2023-11-12 00:59:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33253076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:52,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294649675] [2023-11-12 00:59:52,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:52,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:52,925 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:59:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:52,962 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2023-11-12 00:59:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:52,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2023-11-12 00:59:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:52,965 INFO L225 Difference]: With dead ends: 117 [2023-11-12 00:59:52,965 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 00:59:52,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:52,966 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:52,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 246 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 00:59:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2023-11-12 00:59:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (17), 12 states have call predecessors, (17), 8 states have call successors, (17) [2023-11-12 00:59:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2023-11-12 00:59:52,976 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 65 [2023-11-12 00:59:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:52,978 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2023-11-12 00:59:52,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:59:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2023-11-12 00:59:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 00:59:52,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:52,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:59:52,981 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:52,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2075972807, now seen corresponding path program 1 times [2023-11-12 00:59:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:52,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61264277] [2023-11-12 00:59:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:59:53,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:53,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61264277] [2023-11-12 00:59:53,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61264277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236251164] [2023-11-12 00:59:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:53,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:53,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:53,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:53,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:59:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:53,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:59:53,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:59:53,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:59:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236251164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498901093] [2023-11-12 00:59:53,462 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-12 00:59:53,463 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:53,464 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:59:53,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:53,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-12 00:59:53,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684713389] [2023-11-12 00:59:53,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:53,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:53,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:53,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:53,470 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 7 states, 5 states have (on average 12.2) internal successors, (61), 7 states have internal predecessors, (61), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-12 00:59:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:53,530 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2023-11-12 00:59:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:53,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 12.2) internal successors, (61), 7 states have internal predecessors, (61), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 7 states have call successors, (12) Word has length 66 [2023-11-12 00:59:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:53,533 INFO L225 Difference]: With dead ends: 124 [2023-11-12 00:59:53,533 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 00:59:53,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:53,534 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 19 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:53,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 166 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 00:59:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-11-12 00:59:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-12 00:59:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2023-11-12 00:59:53,542 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 66 [2023-11-12 00:59:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:53,542 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2023-11-12 00:59:53,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 12.2) internal successors, (61), 7 states have internal predecessors, (61), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-12 00:59:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2023-11-12 00:59:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 00:59:53,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:53,544 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:53,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:53,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:59:53,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:53,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1627957863, now seen corresponding path program 1 times [2023-11-12 00:59:53,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:53,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404094158] [2023-11-12 00:59:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:59:53,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:53,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404094158] [2023-11-12 00:59:53,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404094158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:53,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:53,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:53,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045499488] [2023-11-12 00:59:53,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:53,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:53,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:53,846 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:59:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:53,876 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2023-11-12 00:59:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:53,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-11-12 00:59:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:53,879 INFO L225 Difference]: With dead ends: 113 [2023-11-12 00:59:53,879 INFO L226 Difference]: Without dead ends: 62 [2023-11-12 00:59:53,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:53,884 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:53,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-12 00:59:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-11-12 00:59:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (16), 10 states have call predecessors, (16), 7 states have call successors, (16) [2023-11-12 00:59:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-12 00:59:53,893 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 66 [2023-11-12 00:59:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:53,893 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-12 00:59:53,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:59:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-12 00:59:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 00:59:53,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:53,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:53,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:59:53,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:53,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1340831987, now seen corresponding path program 1 times [2023-11-12 00:59:53,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:53,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286242002] [2023-11-12 00:59:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:53,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:59:54,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286242002] [2023-11-12 00:59:54,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286242002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747548126] [2023-11-12 00:59:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:54,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:54,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:54,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:59:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:54,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:59:54,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:59:54,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:59:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747548126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328957324] [2023-11-12 00:59:54,649 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-11-12 00:59:54,649 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:54,650 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:59:54,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:54,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-12 00:59:54,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385955281] [2023-11-12 00:59:54,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:54,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:59:54,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:54,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:59:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:59:54,656 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 9 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (12), 4 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-12 00:59:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:54,813 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2023-11-12 00:59:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:54,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 9 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (12), 4 states have call predecessors, (12), 9 states have call successors, (12) Word has length 60 [2023-11-12 00:59:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:54,816 INFO L225 Difference]: With dead ends: 92 [2023-11-12 00:59:54,816 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 00:59:54,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:59:54,817 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 42 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:54,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 188 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 00:59:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-12 00:59:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 47 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 10 states have return successors, (20), 12 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-12 00:59:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2023-11-12 00:59:54,841 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 60 [2023-11-12 00:59:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:54,841 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2023-11-12 00:59:54,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 9 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (12), 4 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-12 00:59:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2023-11-12 00:59:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:59:54,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:54,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:54,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:55,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 00:59:55,049 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:55,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2129490437, now seen corresponding path program 2 times [2023-11-12 00:59:55,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:55,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91062255] [2023-11-12 00:59:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:59:55,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91062255] [2023-11-12 00:59:55,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91062255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061765902] [2023-11-12 00:59:55,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:59:55,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:55,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:55,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:55,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:59:55,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 00:59:55,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:55,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:59:55,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:59:55,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:59:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061765902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:56,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471909775] [2023-11-12 00:59:56,464 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-11-12 00:59:56,464 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:56,465 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:59:56,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:56,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 20 [2023-11-12 00:59:56,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319931342] [2023-11-12 00:59:56,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:56,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 00:59:56,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 00:59:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:59:56,469 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 20 states, 17 states have (on average 5.294117647058823) internal successors, (90), 20 states have internal predecessors, (90), 12 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (17), 6 states have call predecessors, (17), 12 states have call successors, (17) [2023-11-12 00:59:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:56,762 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2023-11-12 00:59:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:59:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.294117647058823) internal successors, (90), 20 states have internal predecessors, (90), 12 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (17), 6 states have call predecessors, (17), 12 states have call successors, (17) Word has length 69 [2023-11-12 00:59:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:56,764 INFO L225 Difference]: With dead ends: 105 [2023-11-12 00:59:56,764 INFO L226 Difference]: Without dead ends: 86 [2023-11-12 00:59:56,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-12 00:59:56,765 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 85 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:56,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 334 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-12 00:59:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2023-11-12 00:59:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 55 states have internal predecessors, (60), 8 states have call successors, (8), 3 states have call predecessors, (8), 13 states have return successors, (29), 16 states have call predecessors, (29), 8 states have call successors, (29) [2023-11-12 00:59:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2023-11-12 00:59:56,774 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 69 [2023-11-12 00:59:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:56,775 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2023-11-12 00:59:56,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.294117647058823) internal successors, (90), 20 states have internal predecessors, (90), 12 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (17), 6 states have call predecessors, (17), 12 states have call successors, (17) [2023-11-12 00:59:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2023-11-12 00:59:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-12 00:59:56,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:56,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:56,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:56,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:59:56,982 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:56,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1734203497, now seen corresponding path program 1 times [2023-11-12 00:59:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:56,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775467805] [2023-11-12 00:59:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:56,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 00:59:57,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:57,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775467805] [2023-11-12 00:59:57,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775467805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:57,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:57,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:57,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847897714] [2023-11-12 00:59:57,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:57,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:57,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:57,067 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:59:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:57,115 INFO L93 Difference]: Finished difference Result 147 states and 212 transitions. [2023-11-12 00:59:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2023-11-12 00:59:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:57,118 INFO L225 Difference]: With dead ends: 147 [2023-11-12 00:59:57,118 INFO L226 Difference]: Without dead ends: 75 [2023-11-12 00:59:57,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:57,120 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:57,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 156 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:59:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-12 00:59:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-12 00:59:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 55 states have internal predecessors, (60), 8 states have call successors, (8), 3 states have call predecessors, (8), 13 states have return successors, (26), 16 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-12 00:59:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2023-11-12 00:59:57,130 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 76 [2023-11-12 00:59:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:57,131 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2023-11-12 00:59:57,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:59:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2023-11-12 00:59:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-12 00:59:57,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:57,133 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:57,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 00:59:57,133 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:57,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1605702583, now seen corresponding path program 2 times [2023-11-12 00:59:57,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:57,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346700882] [2023-11-12 00:59:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:59:57,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346700882] [2023-11-12 00:59:57,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346700882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762041802] [2023-11-12 00:59:57,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:59:57,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:57,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:57,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:57,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:59:57,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 00:59:57,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:57,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:59:57,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:59:57,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:59:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762041802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:58,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754532854] [2023-11-12 00:59:58,168 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-12 00:59:58,169 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:58,169 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:59:58,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:59:58,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2023-11-12 00:59:58,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872329083] [2023-11-12 00:59:58,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:59:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:59:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:58,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:59:58,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:59:58,176 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 21 states, 19 states have (on average 5.105263157894737) internal successors, (97), 21 states have internal predecessors, (97), 9 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-12 00:59:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:58,400 INFO L93 Difference]: Finished difference Result 118 states and 166 transitions. [2023-11-12 00:59:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:59:58,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.105263157894737) internal successors, (97), 21 states have internal predecessors, (97), 9 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 85 [2023-11-12 00:59:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:58,401 INFO L225 Difference]: With dead ends: 118 [2023-11-12 00:59:58,401 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:59:58,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:59:58,403 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:58,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 244 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:59:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:59:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:59:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 00:59:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:59:58,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2023-11-12 00:59:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:58,404 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:59:58,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.105263157894737) internal successors, (97), 21 states have internal predecessors, (97), 9 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-12 00:59:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:59:58,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:59:58,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:59:58,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:58,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:58,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-12 00:59:58,794 INFO L895 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (and (<= |multiple_of_#in~n| multiple_of_~n) (<= |multiple_of_#in~m| multiple_of_~m) (<= (+ |multiple_of_#in~m| 1) 0)) [2023-11-12 00:59:58,795 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 34) no Hoare annotation was computed. [2023-11-12 00:59:58,795 INFO L899 garLoopResultBuilder]: For program point L33-1(line 33) no Hoare annotation was computed. [2023-11-12 00:59:58,795 INFO L899 garLoopResultBuilder]: For program point multiple_ofFINAL(lines 31 45) no Hoare annotation was computed. [2023-11-12 00:59:58,795 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |multiple_of_#in~m| multiple_of_~m) (= |multiple_of_#in~n| multiple_of_~n) (<= 1 multiple_of_~n)) [2023-11-12 00:59:58,795 INFO L899 garLoopResultBuilder]: For program point L44-1(line 44) no Hoare annotation was computed. [2023-11-12 00:59:58,795 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 31 45) the Hoare annotation is: true [2023-11-12 00:59:58,795 INFO L899 garLoopResultBuilder]: For program point L41(lines 41 43) no Hoare annotation was computed. [2023-11-12 00:59:58,795 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 40) no Hoare annotation was computed. [2023-11-12 00:59:58,796 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ multiple_of_~n 1) 0) (= |multiple_of_#in~m| multiple_of_~m) (= |multiple_of_#in~n| multiple_of_~n)) [2023-11-12 00:59:58,796 INFO L899 garLoopResultBuilder]: For program point multiple_ofEXIT(lines 31 45) no Hoare annotation was computed. [2023-11-12 00:59:58,796 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 37) no Hoare annotation was computed. [2023-11-12 00:59:58,796 INFO L899 garLoopResultBuilder]: For program point L36-1(line 36) no Hoare annotation was computed. [2023-11-12 00:59:58,796 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= |mult_#in~n| mult_~n) (<= |mult_#in~m| mult_~m) (<= 2 mult_~m)) [2023-11-12 00:59:58,796 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-11-12 00:59:58,796 INFO L899 garLoopResultBuilder]: For program point L24(lines 24 26) no Hoare annotation was computed. [2023-11-12 00:59:58,796 INFO L899 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2023-11-12 00:59:58,796 INFO L895 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (and (<= |mult_#in~m| mult_~m) (<= |mult_#in~m| 0)) [2023-11-12 00:59:58,796 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-11-12 00:59:58,797 INFO L899 garLoopResultBuilder]: For program point L19-1(line 19) no Hoare annotation was computed. [2023-11-12 00:59:58,797 INFO L899 garLoopResultBuilder]: For program point multFINAL(lines 17 28) no Hoare annotation was computed. [2023-11-12 00:59:58,797 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 28) the Hoare annotation is: true [2023-11-12 00:59:58,797 INFO L899 garLoopResultBuilder]: For program point multEXIT(lines 17 28) no Hoare annotation was computed. [2023-11-12 00:59:58,797 INFO L899 garLoopResultBuilder]: For program point L97(line 97) no Hoare annotation was computed. [2023-11-12 00:59:58,797 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-12 00:59:58,797 INFO L895 garLoopResultBuilder]: At program point L97-1(line 97) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~n~0#1| 2) (<= 1 |ULTIMATE.start_main_~n~0#1|)) [2023-11-12 00:59:58,797 INFO L899 garLoopResultBuilder]: For program point L97-2(line 97) no Hoare annotation was computed. [2023-11-12 00:59:58,797 INFO L899 garLoopResultBuilder]: For program point L97-4(lines 97 101) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point L97-5(lines 76 102) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point L91(lines 91 95) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point L85(lines 85 89) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point L98(line 98) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 98) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_is_prime_~n#1|)) [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point L53-1(line 53) no Hoare annotation was computed. [2023-11-12 00:59:58,798 INFO L899 garLoopResultBuilder]: For program point L78(lines 78 82) no Hoare annotation was computed. [2023-11-12 00:59:58,799 INFO L899 garLoopResultBuilder]: For program point L65(lines 65 72) no Hoare annotation was computed. [2023-11-12 00:59:58,799 INFO L899 garLoopResultBuilder]: For program point is_prime_EXIT(lines 57 74) no Hoare annotation was computed. [2023-11-12 00:59:58,799 INFO L899 garLoopResultBuilder]: For program point L64(lines 64 73) no Hoare annotation was computed. [2023-11-12 00:59:58,799 INFO L899 garLoopResultBuilder]: For program point L61(lines 61 63) no Hoare annotation was computed. [2023-11-12 00:59:58,799 INFO L899 garLoopResultBuilder]: For program point is_prime_FINAL(lines 57 74) no Hoare annotation was computed. [2023-11-12 00:59:58,799 INFO L899 garLoopResultBuilder]: For program point L58(lines 58 60) no Hoare annotation was computed. [2023-11-12 00:59:58,799 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 57 74) the Hoare annotation is: true [2023-11-12 00:59:58,799 INFO L895 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (or (and (<= (* 2 |is_prime__#in~m|) |is_prime__#in~n|) (= |is_prime__#in~n| is_prime__~n) (= |is_prime__#in~m| is_prime__~m) (<= 2 is_prime__~m)) (and (<= |is_prime__#in~n| |is_prime__#in~m|) (<= (+ |is_prime__#in~m| is_prime__~n) (+ |is_prime__#in~n| is_prime__~m)) (<= |is_prime__#in~n| is_prime__~n) (<= 3 is_prime__~n) (<= is_prime__~m |is_prime__#in~m|))) [2023-11-12 00:59:58,799 INFO L899 garLoopResultBuilder]: For program point L71-1(line 71) no Hoare annotation was computed. [2023-11-12 00:59:58,800 INFO L895 garLoopResultBuilder]: At program point L68(line 68) the Hoare annotation is: (and (<= 2 is_prime__~m) (<= (+ |is_prime__#in~m| is_prime__~n) (+ |is_prime__#in~n| is_prime__~m)) (<= |is_prime__#in~n| is_prime__~n) (<= 3 is_prime__~n) (<= is_prime__~m |is_prime__#in~m|)) [2023-11-12 00:59:58,800 INFO L899 garLoopResultBuilder]: For program point L68-1(line 68) no Hoare annotation was computed. [2023-11-12 00:59:58,800 INFO L899 garLoopResultBuilder]: For program point L68-2(lines 68 70) no Hoare annotation was computed. [2023-11-12 00:59:58,803 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:58,805 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:59:58,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:59:58 BoogieIcfgContainer [2023-11-12 00:59:58,809 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:59:58,810 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:59:58,810 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:59:58,810 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:59:58,810 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:47" (3/4) ... [2023-11-12 00:59:58,812 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 00:59:58,816 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure multiple_of [2023-11-12 00:59:58,816 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure mult [2023-11-12 00:59:58,817 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure is_prime_ [2023-11-12 00:59:58,825 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-11-12 00:59:58,826 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-12 00:59:58,826 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-12 00:59:58,826 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 00:59:58,928 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:59:58,928 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/witness.yml [2023-11-12 00:59:58,929 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:59:58,930 INFO L158 Benchmark]: Toolchain (without parser) took 11883.17ms. Allocated memory was 169.9MB in the beginning and 264.2MB in the end (delta: 94.4MB). Free memory was 129.1MB in the beginning and 147.8MB in the end (delta: -18.7MB). Peak memory consumption was 77.9MB. Max. memory is 16.1GB. [2023-11-12 00:59:58,930 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 169.9MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:59:58,931 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.97ms. Allocated memory is still 169.9MB. Free memory was 129.1MB in the beginning and 117.8MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:59:58,931 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.47ms. Allocated memory is still 169.9MB. Free memory was 117.8MB in the beginning and 116.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:59:58,931 INFO L158 Benchmark]: Boogie Preprocessor took 38.02ms. Allocated memory is still 169.9MB. Free memory was 116.0MB in the beginning and 115.2MB in the end (delta: 891.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:59:58,932 INFO L158 Benchmark]: RCFGBuilder took 490.06ms. Allocated memory is still 169.9MB. Free memory was 114.8MB in the beginning and 100.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-12 00:59:58,932 INFO L158 Benchmark]: TraceAbstraction took 10916.25ms. Allocated memory was 169.9MB in the beginning and 264.2MB in the end (delta: 94.4MB). Free memory was 99.7MB in the beginning and 153.0MB in the end (delta: -53.3MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. [2023-11-12 00:59:58,934 INFO L158 Benchmark]: Witness Printer took 119.07ms. Allocated memory is still 264.2MB. Free memory was 153.0MB in the beginning and 147.8MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-12 00:59:58,938 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 169.9MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.97ms. Allocated memory is still 169.9MB. Free memory was 129.1MB in the beginning and 117.8MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.47ms. Allocated memory is still 169.9MB. Free memory was 117.8MB in the beginning and 116.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.02ms. Allocated memory is still 169.9MB. Free memory was 116.0MB in the beginning and 115.2MB in the end (delta: 891.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 490.06ms. Allocated memory is still 169.9MB. Free memory was 114.8MB in the beginning and 100.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 10916.25ms. Allocated memory was 169.9MB in the beginning and 264.2MB in the end (delta: 94.4MB). Free memory was 99.7MB in the beginning and 153.0MB in the end (delta: -53.3MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. * Witness Printer took 119.07ms. Allocated memory is still 264.2MB. Free memory was 153.0MB in the beginning and 147.8MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 98]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.8s, OverallIterations: 17, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 371 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 340 mSDsluCounter, 4107 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3272 mSDsCounter, 134 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1275 IncrementalHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 134 mSolverCounterUnsat, 835 mSDtfsCounter, 1275 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 877 GetRequests, 704 SyntacticMatches, 15 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=15, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 34 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 254 PreInvPairs, 298 NumberOfFragments, 124 HoareAnnotationTreeSize, 254 FomulaSimplifications, 301 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 153 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 1201 NumberOfCodeBlocks, 1192 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1510 ConstructedInterpolants, 0 QuantifiedInterpolants, 3355 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1164 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 30 InterpolantComputations, 11 PerfectInterpolantSequences, 513/697 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-12 00:59:58,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a31a1f66-a963-4e53-ab7d-6df9174050da/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE