./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eda92234de2991558d0fa68c10405194bf8879d4d71f81bbe5c79bf2cf318fe2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:11:16,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:11:16,899 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 04:11:16,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:11:16,914 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:11:16,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:11:16,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:11:16,964 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:11:16,966 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:11:16,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:11:16,972 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:11:16,974 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:11:16,975 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:11:16,977 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:11:16,978 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:11:16,978 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:11:16,979 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:11:16,979 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:11:16,979 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:11:16,980 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:11:16,980 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:11:16,981 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:11:16,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:11:16,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:11:16,984 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:11:16,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:11:16,985 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:11:16,985 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:11:16,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:11:16,986 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:11:16,988 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:11:16,988 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:11:16,988 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:11:16,988 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:11:16,989 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:11:16,989 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:11:16,989 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:11:16,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:11:16,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:11:16,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:11:16,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:11:16,991 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:11:16,991 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:11:16,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:11:16,992 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:11:16,992 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:11:16,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:11:16,993 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_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eda92234de2991558d0fa68c10405194bf8879d4d71f81bbe5c79bf2cf318fe2 [2023-11-19 04:11:17,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:11:17,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:11:17,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:11:17,415 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:11:17,416 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:11:17,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/recursive/EvenOdd03.c [2023-11-19 04:11:20,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:11:21,055 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:11:21,055 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/sv-benchmarks/c/recursive/EvenOdd03.c [2023-11-19 04:11:21,064 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/data/1b49b4480/7b28e97e53134f1da908e15da0dbefd9/FLAG2a9c40906 [2023-11-19 04:11:21,081 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/data/1b49b4480/7b28e97e53134f1da908e15da0dbefd9 [2023-11-19 04:11:21,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:11:21,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:11:21,086 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:11:21,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:11:21,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:11:21,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd01611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21, skipping insertion in model container [2023-11-19 04:11:21,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,117 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:11:21,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:11:21,302 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:11:21,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:11:21,348 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:11:21,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21 WrapperNode [2023-11-19 04:11:21,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:11:21,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:11:21,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:11:21,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:11:21,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,367 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,386 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2023-11-19 04:11:21,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:11:21,388 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:11:21,388 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:11:21,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:11:21,398 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,400 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,407 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,409 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:11:21,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:11:21,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:11:21,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:11:21,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (1/1) ... [2023-11-19 04:11:21,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:11:21,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:21,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:11:21,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:11:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:11:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-11-19 04:11:21,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-11-19 04:11:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:11:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-11-19 04:11:21,513 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-11-19 04:11:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:11:21,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:11:21,586 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:11:21,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:11:21,796 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:11:21,858 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:11:21,858 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:11:21,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:21 BoogieIcfgContainer [2023-11-19 04:11:21,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:11:21,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:11:21,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:11:21,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:11:21,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:11:21" (1/3) ... [2023-11-19 04:11:21,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1976b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:21, skipping insertion in model container [2023-11-19 04:11:21,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:21" (2/3) ... [2023-11-19 04:11:21,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1976b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:21, skipping insertion in model container [2023-11-19 04:11:21,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:21" (3/3) ... [2023-11-19 04:11:21,875 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd03.c [2023-11-19 04:11:21,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:11:21,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 04:11:21,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:11:21,966 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;@77c43c76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:11:21,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 04:11:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:11:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:11:21,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:21,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:21,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:21,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1216065236, now seen corresponding path program 1 times [2023-11-19 04:11:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:22,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908476205] [2023-11-19 04:11:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:22,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:22,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:22,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908476205] [2023-11-19 04:11:22,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908476205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:22,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:22,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:11:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002324196] [2023-11-19 04:11:22,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:22,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:11:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:11:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:11:22,333 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:22,475 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-19 04:11:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:11:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 04:11:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:22,490 INFO L225 Difference]: With dead ends: 42 [2023-11-19 04:11:22,491 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:11:22,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:11:22,502 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:22,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:11:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:11:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-19 04:11:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-11-19 04:11:22,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2023-11-19 04:11:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:22,551 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-11-19 04:11:22,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-11-19 04:11:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 04:11:22,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:22,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:22,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:11:22,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:22,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash -956683306, now seen corresponding path program 1 times [2023-11-19 04:11:22,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:22,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107436918] [2023-11-19 04:11:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:22,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:22,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:22,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107436918] [2023-11-19 04:11:22,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107436918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:22,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:22,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:22,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452605871] [2023-11-19 04:11:22,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:22,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:11:22,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:11:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:11:22,685 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:22,738 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-11-19 04:11:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:11:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 04:11:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:22,740 INFO L225 Difference]: With dead ends: 26 [2023-11-19 04:11:22,740 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:11:22,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:11:22,743 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:22,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:11:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:11:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-19 04:11:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-11-19 04:11:22,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2023-11-19 04:11:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:22,751 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-11-19 04:11:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-11-19 04:11:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:11:22,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:22,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:22,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:11:22,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:22,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1468738500, now seen corresponding path program 1 times [2023-11-19 04:11:22,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979589008] [2023-11-19 04:11:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:22,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:22,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979589008] [2023-11-19 04:11:22,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979589008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:22,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:22,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:11:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480416660] [2023-11-19 04:11:22,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:22,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:11:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:11:22,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:11:22,922 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:23,054 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-11-19 04:11:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:11:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:11:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:23,061 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:11:23,062 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 04:11:23,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:11:23,065 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:23,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:11:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 04:11:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-19 04:11:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2023-11-19 04:11:23,076 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 13 [2023-11-19 04:11:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:23,077 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2023-11-19 04:11:23,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2023-11-19 04:11:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:11:23,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:23,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:23,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:11:23,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:23,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1713746698, now seen corresponding path program 1 times [2023-11-19 04:11:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:23,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073445761] [2023-11-19 04:11:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:23,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:23,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073445761] [2023-11-19 04:11:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073445761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:23,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:11:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321631210] [2023-11-19 04:11:23,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:23,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:11:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:11:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:11:23,220 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:23,286 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2023-11-19 04:11:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:11:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 04:11:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:23,288 INFO L225 Difference]: With dead ends: 29 [2023-11-19 04:11:23,288 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 04:11:23,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:11:23,291 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:23,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:11:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 04:11:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 04:11:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2023-11-19 04:11:23,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2023-11-19 04:11:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:23,299 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2023-11-19 04:11:23,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2023-11-19 04:11:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:11:23,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:23,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:23,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:11:23,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:23,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -683185754, now seen corresponding path program 1 times [2023-11-19 04:11:23,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:23,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971706989] [2023-11-19 04:11:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:23,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:23,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:23,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971706989] [2023-11-19 04:11:23,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971706989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:23,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181628825] [2023-11-19 04:11:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:23,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:23,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:23,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:11:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:23,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:11:23,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:23,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181628825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:23,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467282779] [2023-11-19 04:11:23,937 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:11:23,937 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:24,000 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:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-11-19 04:11:24,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:11:24,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-19 04:11:24,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519854914] [2023-11-19 04:11:24,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:11:24,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 04:11:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 04:11:24,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:11:24,008 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:24,257 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-19 04:11:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:11:24,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 04:11:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:24,259 INFO L225 Difference]: With dead ends: 49 [2023-11-19 04:11:24,259 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 04:11:24,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:11:24,261 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:24,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:11:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 04:11:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-19 04:11:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2023-11-19 04:11:24,271 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 19 [2023-11-19 04:11:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:24,272 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2023-11-19 04:11:24,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2023-11-19 04:11:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 04:11:24,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:24,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 04:11:24,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:11:24,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:24,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:24,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash 550857576, now seen corresponding path program 1 times [2023-11-19 04:11:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:24,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468026704] [2023-11-19 04:11:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:24,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:24,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468026704] [2023-11-19 04:11:24,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468026704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226459332] [2023-11-19 04:11:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:24,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:24,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:24,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:24,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:11:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:24,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 04:11:24,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:24,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226459332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588360604] [2023-11-19 04:11:25,250 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:11:25,250 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:25,250 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:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-11-19 04:11:25,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:11:25,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-19 04:11:25,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179886684] [2023-11-19 04:11:25,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:11:25,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 04:11:25,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:25,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 04:11:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-11-19 04:11:25,255 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:25,670 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2023-11-19 04:11:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 04:11:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 04:11:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:25,673 INFO L225 Difference]: With dead ends: 91 [2023-11-19 04:11:25,673 INFO L226 Difference]: Without dead ends: 89 [2023-11-19 04:11:25,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 04:11:25,675 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:25,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 74 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:11:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-19 04:11:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2023-11-19 04:11:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2023-11-19 04:11:25,691 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 37 [2023-11-19 04:11:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:25,691 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2023-11-19 04:11:25,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2023-11-19 04:11:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 04:11:25,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:25,695 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2023-11-19 04:11:25,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:11:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:25,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:25,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:25,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1723665088, now seen corresponding path program 2 times [2023-11-19 04:11:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:25,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720371240] [2023-11-19 04:11:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:25,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:26,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720371240] [2023-11-19 04:11:26,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720371240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980205304] [2023-11-19 04:11:26,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:11:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:26,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:26,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:11:26,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-19 04:11:26,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:11:26,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 04:11:26,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:26,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980205304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265237427] [2023-11-19 04:11:27,955 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:11:27,955 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:27,955 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:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-11-19 04:11:27,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:11:27,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2023-11-19 04:11:27,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228902230] [2023-11-19 04:11:27,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:11:27,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-19 04:11:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-19 04:11:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2023-11-19 04:11:27,962 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:28,995 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2023-11-19 04:11:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-19 04:11:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-19 04:11:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:29,000 INFO L225 Difference]: With dead ends: 169 [2023-11-19 04:11:29,004 INFO L226 Difference]: Without dead ends: 167 [2023-11-19 04:11:29,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2023-11-19 04:11:29,009 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 260 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:29,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 87 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-19 04:11:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2023-11-19 04:11:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 137 states have internal predecessors, (138), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2023-11-19 04:11:29,053 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 79 [2023-11-19 04:11:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:29,054 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2023-11-19 04:11:29,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2023-11-19 04:11:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-19 04:11:29,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:29,068 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1] [2023-11-19 04:11:29,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:11:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:29,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:29,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash -822504036, now seen corresponding path program 2 times [2023-11-19 04:11:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:29,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191920810] [2023-11-19 04:11:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:29,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:31,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:31,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191920810] [2023-11-19 04:11:31,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191920810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:31,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429666758] [2023-11-19 04:11:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:11:31,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:31,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:31,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:31,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:11:31,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-19 04:11:31,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:11:31,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-19 04:11:31,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:31,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:34,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429666758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:34,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153998103] [2023-11-19 04:11:34,615 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:11:34,615 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:34,615 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:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-11-19 04:11:34,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:11:34,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-11-19 04:11:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182021094] [2023-11-19 04:11:34,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:11:34,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-19 04:11:34,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:34,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-19 04:11:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2023-11-19 04:11:34,628 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:37,757 INFO L93 Difference]: Finished difference Result 331 states and 356 transitions. [2023-11-19 04:11:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-19 04:11:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2023-11-19 04:11:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:37,762 INFO L225 Difference]: With dead ends: 331 [2023-11-19 04:11:37,762 INFO L226 Difference]: Without dead ends: 329 [2023-11-19 04:11:37,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3672, Invalid=21768, Unknown=0, NotChecked=0, Total=25440 [2023-11-19 04:11:37,777 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 735 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:37,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 115 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:11:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-19 04:11:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2023-11-19 04:11:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 271 states have (on average 1.007380073800738) internal successors, (273), 272 states have internal predecessors, (273), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2023-11-19 04:11:37,834 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 157 [2023-11-19 04:11:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:37,835 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2023-11-19 04:11:37,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:11:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2023-11-19 04:11:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-19 04:11:37,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:37,849 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1] [2023-11-19 04:11:37,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:11:38,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:38,064 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:11:38,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1777373480, now seen corresponding path program 3 times [2023-11-19 04:11:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:38,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054970518] [2023-11-19 04:11:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:38,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:45,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:45,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054970518] [2023-11-19 04:11:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054970518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772657040] [2023-11-19 04:11:45,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:11:45,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:45,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:45,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:45,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:11:45,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:11:45,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:11:45,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-19 04:11:45,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:46,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:54,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772657040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:54,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876973331] [2023-11-19 04:11:54,550 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:11:54,551 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:54,551 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:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-11-19 04:11:54,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:11:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2023-11-19 04:11:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058663139] [2023-11-19 04:11:54,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:11:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2023-11-19 04:11:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2023-11-19 04:11:54,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2023-11-19 04:11:54,569 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:03,012 INFO L93 Difference]: Finished difference Result 649 states and 700 transitions. [2023-11-19 04:12:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-11-19 04:12:03,013 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2023-11-19 04:12:03,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:03,017 INFO L225 Difference]: With dead ends: 649 [2023-11-19 04:12:03,018 INFO L226 Difference]: Without dead ends: 647 [2023-11-19 04:12:03,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2023-11-19 04:12:03,028 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2120 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:12:03,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2120 Valid, 108 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:12:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-11-19 04:12:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2023-11-19 04:12:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 536 states have (on average 1.0037313432835822) internal successors, (538), 537 states have internal predecessors, (538), 107 states have call successors, (107), 107 states have call predecessors, (107), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 645 transitions. [2023-11-19 04:12:03,076 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 645 transitions. Word has length 319 [2023-11-19 04:12:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:03,077 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 645 transitions. [2023-11-19 04:12:03,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 645 transitions. [2023-11-19 04:12:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2023-11-19 04:12:03,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:03,094 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 52, 1, 1, 1, 1] [2023-11-19 04:12:03,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:12:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b79dfb-9d5a-4219-8dfd-a715e0699903/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:03,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:12:03,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1131133332, now seen corresponding path program 3 times [2023-11-19 04:12:03,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:03,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852290703] [2023-11-19 04:12:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:03,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat