./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 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_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire --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 64bit --witnessprinter.graph.data.programhash 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:01,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:01,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-23 21:16:01,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:01,873 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:01,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:01,922 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:01,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:01,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:01,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:01,931 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:01,932 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:01,932 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:01,934 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:01,935 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:01,935 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:01,936 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:01,936 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:01,937 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:01,937 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:01,938 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:01,939 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:01,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:01,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:01,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:01,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:01,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:01,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:01,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:01,944 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:16:01,945 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:16:01,946 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:01,946 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:01,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:01,947 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:01,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:01,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:01,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:01,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:01,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:01,949 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:01,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:01,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:01,950 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:01,950 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:01,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:01,951 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_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 [2023-11-23 21:16:02,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:02,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:02,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:02,337 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:02,339 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:02,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2023-11-23 21:16:05,641 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:16:05,911 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:16:05,913 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2023-11-23 21:16:05,922 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/data/91b7da294/9e1988ad24a940afa68dda46cc1cfdeb/FLAG9bb516d29 [2023-11-23 21:16:05,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/data/91b7da294/9e1988ad24a940afa68dda46cc1cfdeb [2023-11-23 21:16:05,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:16:05,954 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:16:05,960 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:05,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:16:05,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:16:05,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:05" (1/1) ... [2023-11-23 21:16:05,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9a6be3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:05, skipping insertion in model container [2023-11-23 21:16:05,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:05" (1/1) ... [2023-11-23 21:16:05,992 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:16:06,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:06,188 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:16:06,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:06,222 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:16:06,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06 WrapperNode [2023-11-23 21:16:06,223 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:06,225 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:06,225 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:16:06,225 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:16:06,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,239 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,260 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2023-11-23 21:16:06,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:06,262 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:16:06,262 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:16:06,262 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:16:06,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,273 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,274 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:16:06,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:16:06,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:16:06,285 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:16:06,286 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (1/1) ... [2023-11-23 21:16:06,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:06,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:16:06,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:16:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:16:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-11-23 21:16:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-11-23 21:16:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:16:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-11-23 21:16:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-11-23 21:16:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:16:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:16:06,438 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:16:06,441 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:16:06,580 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:16:06,639 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:16:06,639 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:16:06,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:06 BoogieIcfgContainer [2023-11-23 21:16:06,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:16:06,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:16:06,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:16:06,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:16:06,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:05" (1/3) ... [2023-11-23 21:16:06,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b5064f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:06, skipping insertion in model container [2023-11-23 21:16:06,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:06" (2/3) ... [2023-11-23 21:16:06,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b5064f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:06, skipping insertion in model container [2023-11-23 21:16:06,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:06" (3/3) ... [2023-11-23 21:16:06,650 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-2.c [2023-11-23 21:16:06,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:16:06,667 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-23 21:16:06,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:16:06,736 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;@2325bd9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:16:06,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 21:16:06,740 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) [2023-11-23 21:16:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:16:06,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:06,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:06,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:06,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash 329054099, now seen corresponding path program 1 times [2023-11-23 21:16:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:06,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220037308] [2023-11-23 21:16:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:06,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220037308] [2023-11-23 21:16:06,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220037308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:06,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:06,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:16:06,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986098513] [2023-11-23 21:16:06,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:06,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:16:06,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:16:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:16:07,033 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) [2023-11-23 21:16:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:07,180 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-23 21:16:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:16:07,183 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 [2023-11-23 21:16:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:07,191 INFO L225 Difference]: With dead ends: 42 [2023-11-23 21:16:07,191 INFO L226 Difference]: Without dead ends: 26 [2023-11-23 21:16:07,195 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 [2023-11-23 21:16:07,202 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 [2023-11-23 21:16:07,204 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] [2023-11-23 21:16:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-23 21:16:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-23 21:16:07,236 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) [2023-11-23 21:16:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-11-23 21:16:07,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2023-11-23 21:16:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:07,239 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-11-23 21:16:07,239 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) [2023-11-23 21:16:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-11-23 21:16:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:16:07,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:07,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:07,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:16:07,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:07,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:07,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1610742535, now seen corresponding path program 1 times [2023-11-23 21:16:07,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:07,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951502983] [2023-11-23 21:16:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:07,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:07,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951502983] [2023-11-23 21:16:07,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951502983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:07,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:07,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729736730] [2023-11-23 21:16:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:07,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:16:07,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:16:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:16:07,323 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) [2023-11-23 21:16:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:07,361 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-11-23 21:16:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:16:07,362 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 [2023-11-23 21:16:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:07,363 INFO L225 Difference]: With dead ends: 26 [2023-11-23 21:16:07,363 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:16:07,364 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 [2023-11-23 21:16:07,365 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 [2023-11-23 21:16:07,366 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] [2023-11-23 21:16:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:16:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-23 21:16:07,371 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) [2023-11-23 21:16:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-11-23 21:16:07,372 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2023-11-23 21:16:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:07,373 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-11-23 21:16:07,373 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) [2023-11-23 21:16:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-11-23 21:16:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:16:07,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:07,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:07,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:16:07,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:07,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash -641802699, now seen corresponding path program 1 times [2023-11-23 21:16:07,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041358389] [2023-11-23 21:16:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:07,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041358389] [2023-11-23 21:16:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041358389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:07,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:07,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:16:07,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842868432] [2023-11-23 21:16:07,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:07,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:16:07,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:07,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:16:07,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:16:07,539 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) [2023-11-23 21:16:07,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:07,673 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-11-23 21:16:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:16:07,674 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 [2023-11-23 21:16:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:07,676 INFO L225 Difference]: With dead ends: 33 [2023-11-23 21:16:07,678 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 21:16:07,679 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 [2023-11-23 21:16:07,681 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 [2023-11-23 21:16:07,682 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] [2023-11-23 21:16:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 21:16:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-23 21:16:07,687 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) [2023-11-23 21:16:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2023-11-23 21:16:07,688 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 13 [2023-11-23 21:16:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:07,689 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2023-11-23 21:16:07,689 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) [2023-11-23 21:16:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2023-11-23 21:16:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:16:07,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:07,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:07,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:16:07,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:07,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:07,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1578952853, now seen corresponding path program 1 times [2023-11-23 21:16:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:07,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253326278] [2023-11-23 21:16:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:07,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:07,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253326278] [2023-11-23 21:16:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253326278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:16:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956031958] [2023-11-23 21:16:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:16:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:16:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:16:07,788 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) [2023-11-23 21:16:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:07,871 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2023-11-23 21:16:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:16:07,872 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 [2023-11-23 21:16:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:07,873 INFO L225 Difference]: With dead ends: 29 [2023-11-23 21:16:07,873 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:16:07,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:16:07,875 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 [2023-11-23 21:16:07,876 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] [2023-11-23 21:16:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:16:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 21:16:07,882 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) [2023-11-23 21:16:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2023-11-23 21:16:07,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2023-11-23 21:16:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:07,884 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2023-11-23 21:16:07,884 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) [2023-11-23 21:16:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2023-11-23 21:16:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:16:07,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:07,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:07,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:16:07,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:07,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash -89420187, now seen corresponding path program 1 times [2023-11-23 21:16:07,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:07,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645413575] [2023-11-23 21:16:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:07,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:08,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:08,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645413575] [2023-11-23 21:16:08,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645413575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:08,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554224615] [2023-11-23 21:16:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:08,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:08,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:08,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:08,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:16:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:08,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:16:08,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:08,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:16:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:08,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554224615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:16:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1811534860] [2023-11-23 21:16:08,435 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-23 21:16:08,435 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:16:08,439 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) [2023-11-23 21:16:08,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:16:08,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-23 21:16:08,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368146443] [2023-11-23 21:16:08,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:16:08,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:16:08,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:08,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:16:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:16:08,462 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) [2023-11-23 21:16:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:08,689 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-23 21:16:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:16:08,690 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 [2023-11-23 21:16:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:08,694 INFO L225 Difference]: With dead ends: 49 [2023-11-23 21:16:08,694 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:16:08,696 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 [2023-11-23 21:16:08,701 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:08,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:16:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:16:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-23 21:16:08,717 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) [2023-11-23 21:16:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2023-11-23 21:16:08,719 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 19 [2023-11-23 21:16:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:08,719 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2023-11-23 21:16:08,719 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) [2023-11-23 21:16:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2023-11-23 21:16:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:16:08,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:08,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 21:16:08,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:08,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:08,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:08,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 343594457, now seen corresponding path program 1 times [2023-11-23 21:16:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:08,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945226406] [2023-11-23 21:16:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:09,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945226406] [2023-11-23 21:16:09,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945226406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:09,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556624512] [2023-11-23 21:16:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:09,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:09,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:16:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:09,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 21:16:09,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:09,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:16:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:09,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556624512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:16:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061776225] [2023-11-23 21:16:09,676 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-23 21:16:09,677 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:16:09,677 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) [2023-11-23 21:16:09,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:16:09,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-23 21:16:09,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518513145] [2023-11-23 21:16:09,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:16:09,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 21:16:09,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 21:16:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:16:09,681 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) [2023-11-23 21:16:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:10,102 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2023-11-23 21:16:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 21:16:10,103 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 [2023-11-23 21:16:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:10,104 INFO L225 Difference]: With dead ends: 91 [2023-11-23 21:16:10,105 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 21:16:10,106 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 [2023-11-23 21:16:10,107 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-23 21:16:10,108 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] [2023-11-23 21:16:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 21:16:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2023-11-23 21:16:10,122 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) [2023-11-23 21:16:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2023-11-23 21:16:10,124 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 37 [2023-11-23 21:16:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:10,124 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2023-11-23 21:16:10,125 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) [2023-11-23 21:16:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2023-11-23 21:16:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 21:16:10,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:10,128 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2023-11-23 21:16:10,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:10,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:10,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 305757055, now seen corresponding path program 2 times [2023-11-23 21:16:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:10,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604453323] [2023-11-23 21:16:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:10,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:11,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:11,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604453323] [2023-11-23 21:16:11,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604453323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:11,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424647062] [2023-11-23 21:16:11,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:16:11,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:11,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:11,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:11,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:16:11,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 21:16:11,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:16:11,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:16:11,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:11,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:16:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:12,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424647062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:16:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218633743] [2023-11-23 21:16:12,177 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-23 21:16:12,177 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:16:12,178 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) [2023-11-23 21:16:12,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:16:12,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2023-11-23 21:16:12,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226446389] [2023-11-23 21:16:12,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:16:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-23 21:16:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-23 21:16:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2023-11-23 21:16:12,184 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) [2023-11-23 21:16:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:13,202 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2023-11-23 21:16:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-23 21:16:13,203 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 [2023-11-23 21:16:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:13,205 INFO L225 Difference]: With dead ends: 169 [2023-11-23 21:16:13,205 INFO L226 Difference]: Without dead ends: 167 [2023-11-23 21:16:13,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2023-11-23 21:16:13,210 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 260 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-11-23 21:16:13,210 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] [2023-11-23 21:16:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-23 21:16:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2023-11-23 21:16:13,234 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) [2023-11-23 21:16:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2023-11-23 21:16:13,237 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 79 [2023-11-23 21:16:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:13,237 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2023-11-23 21:16:13,238 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) [2023-11-23 21:16:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2023-11-23 21:16:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-23 21:16:13,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:13,242 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1] [2023-11-23 21:16:13,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:13,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:13,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:13,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -352348147, now seen corresponding path program 2 times [2023-11-23 21:16:13,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:13,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373381854] [2023-11-23 21:16:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:15,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373381854] [2023-11-23 21:16:15,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373381854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619215717] [2023-11-23 21:16:15,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:16:15,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:15,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:15,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:15,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:16:15,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-23 21:16:15,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:16:15,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 21:16:15,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:16,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:16:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619215717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:16:18,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230604138] [2023-11-23 21:16:18,701 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-23 21:16:18,701 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:16:18,701 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) [2023-11-23 21:16:18,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:16:18,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-11-23 21:16:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549591542] [2023-11-23 21:16:18,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:16:18,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-23 21:16:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-23 21:16:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2023-11-23 21:16:18,712 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) [2023-11-23 21:16:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:21,435 INFO L93 Difference]: Finished difference Result 331 states and 356 transitions. [2023-11-23 21:16:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-23 21:16:21,436 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 [2023-11-23 21:16:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:21,443 INFO L225 Difference]: With dead ends: 331 [2023-11-23 21:16:21,444 INFO L226 Difference]: Without dead ends: 329 [2023-11-23 21:16:21,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3672, Invalid=21768, Unknown=0, NotChecked=0, Total=25440 [2023-11-23 21:16:21,455 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 [2023-11-23 21:16:21,455 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] [2023-11-23 21:16:21,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-23 21:16:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2023-11-23 21:16:21,534 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) [2023-11-23 21:16:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2023-11-23 21:16:21,536 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 157 [2023-11-23 21:16:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:21,537 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2023-11-23 21:16:21,538 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) [2023-11-23 21:16:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2023-11-23 21:16:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-23 21:16:21,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:21,549 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1] [2023-11-23 21:16:21,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:21,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:21,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash 541733351, now seen corresponding path program 3 times [2023-11-23 21:16:21,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:21,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49903452] [2023-11-23 21:16:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:28,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:28,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49903452] [2023-11-23 21:16:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49903452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545477305] [2023-11-23 21:16:28,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:16:28,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:28,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:28,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:28,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:16:28,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:16:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:16:28,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-23 21:16:28,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:29,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:16:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:16:37,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545477305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:16:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570311608] [2023-11-23 21:16:37,487 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-23 21:16:37,487 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:16:37,487 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) [2023-11-23 21:16:37,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:16:37,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2023-11-23 21:16:37,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991355163] [2023-11-23 21:16:37,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:16:37,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2023-11-23 21:16:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2023-11-23 21:16:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2023-11-23 21:16:37,511 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) [2023-11-23 21:16:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:46,100 INFO L93 Difference]: Finished difference Result 649 states and 700 transitions. [2023-11-23 21:16:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-11-23 21:16:46,101 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 [2023-11-23 21:16:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:46,105 INFO L225 Difference]: With dead ends: 649 [2023-11-23 21:16:46,106 INFO L226 Difference]: Without dead ends: 647 [2023-11-23 21:16:46,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2023-11-23 21:16:46,117 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 [2023-11-23 21:16:46,117 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] [2023-11-23 21:16:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-11-23 21:16:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2023-11-23 21:16:46,160 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) [2023-11-23 21:16:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 645 transitions. [2023-11-23 21:16:46,164 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 645 transitions. Word has length 319 [2023-11-23 21:16:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:46,165 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 645 transitions. [2023-11-23 21:16:46,165 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) [2023-11-23 21:16:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 645 transitions. [2023-11-23 21:16:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2023-11-23 21:16:46,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:46,182 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 52, 1, 1, 1, 1] [2023-11-23 21:16:46,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:46,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c4aad86-65c8-4ed2-8d26-f7c2e0bbb662/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:46,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 21:16:46,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2014095581, now seen corresponding path program 3 times [2023-11-23 21:16:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:46,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203596131] [2023-11-23 21:16:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat