./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:14:25,926 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:14:25,994 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 04:14:26,000 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:14:26,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:14:26,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:14:26,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:14:26,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:14:26,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:14:26,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:14:26,034 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:14:26,035 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:14:26,036 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:14:26,036 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:14:26,037 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:14:26,039 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:14:26,039 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:14:26,042 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:14:26,043 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:14:26,044 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:14:26,044 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:14:26,048 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:14:26,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:14:26,049 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:14:26,049 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:14:26,050 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:14:26,050 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:14:26,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:14:26,052 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:14:26,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:14:26,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:14:26,054 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:14:26,054 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:14:26,054 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:14:26,055 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:14:26,055 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:14:26,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:14:26,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:14:26,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:14:26,056 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:14:26,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:14:26,057 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:14:26,058 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:14:26,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:14:26,058 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:14:26,059 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:14:26,059 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:14:26,059 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_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2023-11-19 04:14:26,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:14:26,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:14:26,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:14:26,431 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:14:26,432 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:14:26,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-11-19 04:14:29,618 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:14:29,838 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:14:29,839 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-11-19 04:14:29,848 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/data/e5894ea89/75c81006f0fb4b20ad9ff8bb71421f65/FLAGb6c07e9d9 [2023-11-19 04:14:29,865 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/data/e5894ea89/75c81006f0fb4b20ad9ff8bb71421f65 [2023-11-19 04:14:29,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:14:29,874 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:14:29,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:14:29,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:14:29,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:14:29,887 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:14:29" (1/1) ... [2023-11-19 04:14:29,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6916ae3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:29, skipping insertion in model container [2023-11-19 04:14:29,889 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:14:29" (1/1) ... [2023-11-19 04:14:29,911 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:14:30,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:14:30,126 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:14:30,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:14:30,163 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:14:30,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30 WrapperNode [2023-11-19 04:14:30,164 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:14:30,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:14:30,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:14:30,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:14:30,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,181 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,198 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2023-11-19 04:14:30,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:14:30,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:14:30,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:14:30,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:14:30,209 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,230 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,234 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:14:30,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:14:30,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:14:30,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:14:30,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (1/1) ... [2023-11-19 04:14:30,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:14:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:30,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:14:30,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:14:30,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:14:30,324 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-11-19 04:14:30,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-11-19 04:14:30,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:14:30,325 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-11-19 04:14:30,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-11-19 04:14:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:14:30,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:14:30,387 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:14:30,390 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:14:30,560 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:14:30,589 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:14:30,589 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:14:30,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:14:30 BoogieIcfgContainer [2023-11-19 04:14:30,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:14:30,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:14:30,597 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:14:30,601 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:14:30,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:14:29" (1/3) ... [2023-11-19 04:14:30,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787f2947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:14:30, skipping insertion in model container [2023-11-19 04:14:30,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:30" (2/3) ... [2023-11-19 04:14:30,603 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787f2947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:14:30, skipping insertion in model container [2023-11-19 04:14:30,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:14:30" (3/3) ... [2023-11-19 04:14:30,604 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2023-11-19 04:14:30,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:14:30,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-19 04:14:30,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:14:30,676 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;@21d5f232, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:14:30,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 04:14:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:14:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:14:30,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:30,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:30,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:30,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1216557780, now seen corresponding path program 1 times [2023-11-19 04:14:30,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:30,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418891277] [2023-11-19 04:14:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:30,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:30,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:30,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418891277] [2023-11-19 04:14:30,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418891277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:14:30,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491470782] [2023-11-19 04:14:30,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:30,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:14:30,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:14:31,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:31,015 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:31,165 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-19 04:14:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:14:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 04:14:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:31,175 INFO L225 Difference]: With dead ends: 42 [2023-11-19 04:14:31,176 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:14:31,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:14:31,184 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:31,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:14:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:14:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-19 04:14:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-11-19 04:14:31,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2023-11-19 04:14:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:31,224 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-11-19 04:14:31,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-11-19 04:14:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 04:14:31,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:31,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:31,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:14:31,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:31,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:31,228 INFO L85 PathProgramCache]: Analyzing trace with hash -941414426, now seen corresponding path program 1 times [2023-11-19 04:14:31,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:31,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645906680] [2023-11-19 04:14:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:31,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:31,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645906680] [2023-11-19 04:14:31,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645906680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:31,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:31,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659296307] [2023-11-19 04:14:31,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:14:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:14:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:31,335 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:31,374 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-11-19 04:14:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:14:31,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 04:14:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:31,376 INFO L225 Difference]: With dead ends: 26 [2023-11-19 04:14:31,376 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 04:14:31,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:14:31,379 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:31,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:14:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 04:14:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-19 04:14:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-11-19 04:14:31,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2023-11-19 04:14:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:31,414 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-11-19 04:14:31,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-11-19 04:14:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:14:31,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:31,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:31,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:14:31,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:31,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash -935205706, now seen corresponding path program 1 times [2023-11-19 04:14:31,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:31,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130756085] [2023-11-19 04:14:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:31,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:31,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130756085] [2023-11-19 04:14:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130756085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:31,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:31,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:14:31,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700609713] [2023-11-19 04:14:31,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:31,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:14:31,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:14:31,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:14:31,580 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:31,688 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-11-19 04:14:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:14:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:14:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:31,689 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:14:31,689 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 04:14:31,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:14:31,691 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:31,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:14:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 04:14:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-19 04:14:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2023-11-19 04:14:31,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 13 [2023-11-19 04:14:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:31,699 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2023-11-19 04:14:31,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2023-11-19 04:14:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:14:31,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:31,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:31,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:14:31,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:31,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1073394228, now seen corresponding path program 1 times [2023-11-19 04:14:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:31,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887224155] [2023-11-19 04:14:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:31,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:31,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:31,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887224155] [2023-11-19 04:14:31,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887224155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:31,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:31,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:14:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132063314] [2023-11-19 04:14:31,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:31,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:14:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:14:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:14:31,800 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:31,857 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2023-11-19 04:14:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:14:31,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 04:14:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:31,859 INFO L225 Difference]: With dead ends: 29 [2023-11-19 04:14:31,859 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 04:14:31,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:14:31,861 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:31,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:14:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 04:14:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 04:14:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2023-11-19 04:14:31,868 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2023-11-19 04:14:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:31,869 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2023-11-19 04:14:31,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2023-11-19 04:14:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:14:31,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:31,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:31,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:14:31,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:31,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash -933892058, now seen corresponding path program 1 times [2023-11-19 04:14:31,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:31,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985972778] [2023-11-19 04:14:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:31,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:32,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985972778] [2023-11-19 04:14:32,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985972778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:32,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842475936] [2023-11-19 04:14:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:32,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:32,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:32,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:32,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:14:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:32,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:14:32,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:32,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:14:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:32,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842475936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:14:32,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925095240] [2023-11-19 04:14:32,419 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:14:32,420 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:14:32,427 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 04:14:32,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:14:32,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-19 04:14:32,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833194793] [2023-11-19 04:14:32,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:14:32,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 04:14:32,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 04:14:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:14:32,432 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:32,636 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-19 04:14:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:14:32,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 04:14:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:32,638 INFO L225 Difference]: With dead ends: 49 [2023-11-19 04:14:32,638 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 04:14:32,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:14:32,640 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 [2023-11-19 04:14:32,641 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] [2023-11-19 04:14:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 04:14:32,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-19 04:14:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2023-11-19 04:14:32,651 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 19 [2023-11-19 04:14:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:32,651 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2023-11-19 04:14:32,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2023-11-19 04:14:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 04:14:32,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:32,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 04:14:32,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:32,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:32,867 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:32,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash 673360218, now seen corresponding path program 1 times [2023-11-19 04:14:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:32,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512278126] [2023-11-19 04:14:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:33,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512278126] [2023-11-19 04:14:33,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512278126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874678330] [2023-11-19 04:14:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:33,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:33,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:33,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:33,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:14:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:33,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 04:14:33,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:33,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:14:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:33,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874678330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:14:33,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1470179469] [2023-11-19 04:14:33,669 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:14:33,669 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:14:33,670 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 04:14:33,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:14:33,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-19 04:14:33,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715362346] [2023-11-19 04:14:33,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:14:33,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 04:14:33,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 04:14:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-11-19 04:14:33,679 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:34,118 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2023-11-19 04:14:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 04:14:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 04:14:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:34,120 INFO L225 Difference]: With dead ends: 91 [2023-11-19 04:14:34,120 INFO L226 Difference]: Without dead ends: 89 [2023-11-19 04:14:34,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 04:14:34,123 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 [2023-11-19 04:14:34,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 74 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:14:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-19 04:14:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2023-11-19 04:14:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2023-11-19 04:14:34,139 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 37 [2023-11-19 04:14:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:34,139 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2023-11-19 04:14:34,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2023-11-19 04:14:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 04:14:34,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:34,143 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2023-11-19 04:14:34,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:34,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:14:34,358 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:34,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 425876928, now seen corresponding path program 2 times [2023-11-19 04:14:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:34,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933355712] [2023-11-19 04:14:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:35,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933355712] [2023-11-19 04:14:35,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933355712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562603537] [2023-11-19 04:14:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:14:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:35,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:35,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:35,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:14:35,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-19 04:14:35,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:14:35,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 04:14:35,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:35,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:14:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562603537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:14:36,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181821206] [2023-11-19 04:14:36,132 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:14:36,132 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:14:36,133 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 04:14:36,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:14:36,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2023-11-19 04:14:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229473015] [2023-11-19 04:14:36,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:14:36,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-19 04:14:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-19 04:14:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2023-11-19 04:14:36,142 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:37,107 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2023-11-19 04:14:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-19 04:14:37,108 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-19 04:14:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:37,109 INFO L225 Difference]: With dead ends: 169 [2023-11-19 04:14:37,109 INFO L226 Difference]: Without dead ends: 167 [2023-11-19 04:14:37,116 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 [2023-11-19 04:14:37,117 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 260 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:37,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 87 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:14:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-19 04:14:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2023-11-19 04:14:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 137 states have internal predecessors, (138), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2023-11-19 04:14:37,156 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 79 [2023-11-19 04:14:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:37,157 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2023-11-19 04:14:37,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2023-11-19 04:14:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-19 04:14:37,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:37,167 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1] [2023-11-19 04:14:37,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:37,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:37,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash -179934066, now seen corresponding path program 2 times [2023-11-19 04:14:37,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:37,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050759596] [2023-11-19 04:14:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:39,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050759596] [2023-11-19 04:14:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050759596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311919003] [2023-11-19 04:14:39,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:14:39,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:39,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:39,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:39,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:14:39,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-19 04:14:39,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:14:39,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-19 04:14:39,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:40,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:14:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311919003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:14:42,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875309225] [2023-11-19 04:14:42,659 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:14:42,659 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:14:42,659 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 04:14:42,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:14:42,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-11-19 04:14:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35268842] [2023-11-19 04:14:42,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:14:42,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-19 04:14:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-19 04:14:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2023-11-19 04:14:42,674 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:45,309 INFO L93 Difference]: Finished difference Result 331 states and 356 transitions. [2023-11-19 04:14:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-19 04:14:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2023-11-19 04:14:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:45,319 INFO L225 Difference]: With dead ends: 331 [2023-11-19 04:14:45,319 INFO L226 Difference]: Without dead ends: 329 [2023-11-19 04:14:45,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3672, Invalid=21768, Unknown=0, NotChecked=0, Total=25440 [2023-11-19 04:14:45,328 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 735 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:45,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 115 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:14:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-19 04:14:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2023-11-19 04:14:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 271 states have (on average 1.007380073800738) internal successors, (273), 272 states have internal predecessors, (273), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2023-11-19 04:14:45,372 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 157 [2023-11-19 04:14:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:45,374 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2023-11-19 04:14:45,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2023-11-19 04:14:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-19 04:14:45,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:45,382 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1] [2023-11-19 04:14:45,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 04:14:45,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 04:14:45,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:14:45,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash 592418344, now seen corresponding path program 3 times [2023-11-19 04:14:45,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:45,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552854477] [2023-11-19 04:14:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:45,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:52,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:52,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552854477] [2023-11-19 04:14:52,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552854477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:52,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887675725] [2023-11-19 04:14:52,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:14:52,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:52,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:52,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:52,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:14:52,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:14:52,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:14:52,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-19 04:14:52,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:53,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:15:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887675725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:15:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435427161] [2023-11-19 04:15:01,498 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:15:01,498 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:01,499 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 04:15:01,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:15:01,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2023-11-19 04:15:01,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513588261] [2023-11-19 04:15:01,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:15:01,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2023-11-19 04:15:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2023-11-19 04:15:01,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2023-11-19 04:15:01,516 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:09,786 INFO L93 Difference]: Finished difference Result 649 states and 700 transitions. [2023-11-19 04:15:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-11-19 04:15:09,787 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2023-11-19 04:15:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:09,791 INFO L225 Difference]: With dead ends: 649 [2023-11-19 04:15:09,791 INFO L226 Difference]: Without dead ends: 647 [2023-11-19 04:15:09,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2023-11-19 04:15:09,801 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2120 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:09,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2120 Valid, 108 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:15:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-11-19 04:15:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2023-11-19 04:15:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 536 states have (on average 1.0037313432835822) internal successors, (538), 537 states have internal predecessors, (538), 107 states have call successors, (107), 107 states have call predecessors, (107), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 645 transitions. [2023-11-19 04:15:09,860 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 645 transitions. Word has length 319 [2023-11-19 04:15:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:09,861 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 645 transitions. [2023-11-19 04:15:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:15:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 645 transitions. [2023-11-19 04:15:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2023-11-19 04:15:09,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:09,878 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 52, 1, 1, 1, 1] [2023-11-19 04:15:09,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:15:10,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_160340b3-40eb-401e-a4e7-017db93852da/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:15:10,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-19 04:15:10,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash 265912670, now seen corresponding path program 3 times [2023-11-19 04:15:10,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:10,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566007434] [2023-11-19 04:15:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:10,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat