./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/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_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/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 64bit --witnessprinter.graph.data.programhash de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:14:44,082 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:14:44,209 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-19 05:14:44,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:14:44,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:14:44,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:14:44,276 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:14:44,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:14:44,278 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:14:44,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:14:44,283 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:14:44,284 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:14:44,285 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:14:44,287 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:14:44,287 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:14:44,287 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:14:44,288 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:14:44,288 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:14:44,289 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:14:44,289 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:14:44,289 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:14:44,290 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:14:44,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:14:44,292 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:14:44,292 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:14:44,293 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:14:44,293 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:14:44,293 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:14:44,294 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:14:44,294 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 05:14:44,296 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:14:44,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:14:44,296 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:14:44,296 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:14:44,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:14:44,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:44,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:14:44,298 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:14:44,298 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:14:44,306 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:14:44,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:14:44,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:14:44,307 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:14:44,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:14:44,308 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_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b [2023-11-19 05:14:44,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:14:44,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:14:44,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:14:44,667 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:14:44,667 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:14:44,669 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/termination-numeric/rec_counter1.c [2023-11-19 05:14:47,727 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:14:48,019 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:14:48,020 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/sv-benchmarks/c/termination-numeric/rec_counter1.c [2023-11-19 05:14:48,027 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/data/7354be390/e2f72f7073954ad2bc1abd20b85b9cbf/FLAGca3b75de5 [2023-11-19 05:14:48,046 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/data/7354be390/e2f72f7073954ad2bc1abd20b85b9cbf [2023-11-19 05:14:48,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:14:48,063 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:14:48,067 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:48,067 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:14:48,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:14:48,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,075 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f155f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48, skipping insertion in model container [2023-11-19 05:14:48,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,099 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:14:48,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:48,290 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:14:48,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:48,318 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:14:48,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48 WrapperNode [2023-11-19 05:14:48,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:48,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:48,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:14:48,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:14:48,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,350 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 13 [2023-11-19 05:14:48,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:48,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:14:48,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:14:48,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:14:48,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,369 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:14:48,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:14:48,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:14:48,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:14:48,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (1/1) ... [2023-11-19 05:14:48,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:48,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:48,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:14:48,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:14:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2023-11-19 05:14:48,452 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2023-11-19 05:14:48,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:14:48,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:14:48,543 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:14:48,545 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:14:48,693 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:14:48,711 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:14:48,712 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:14:48,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:48 BoogieIcfgContainer [2023-11-19 05:14:48,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:14:48,721 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:14:48,721 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:14:48,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:14:48,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:14:48" (1/3) ... [2023-11-19 05:14:48,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdfc6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:48, skipping insertion in model container [2023-11-19 05:14:48,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:48" (2/3) ... [2023-11-19 05:14:48,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdfc6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:48, skipping insertion in model container [2023-11-19 05:14:48,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:48" (3/3) ... [2023-11-19 05:14:48,729 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_counter1.c [2023-11-19 05:14:48,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:14:48,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 05:14:48,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:14:48,811 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;@501edf0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:14:48,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 05:14:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.6) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:14:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 05:14:48,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:48,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 05:14:48,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:48,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1967217591, now seen corresponding path program 1 times [2023-11-19 05:14:48,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:48,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677592447] [2023-11-19 05:14:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:48,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:49,076 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 05:14:49,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:49,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677592447] [2023-11-19 05:14:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677592447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:49,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:49,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:49,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443121096] [2023-11-19 05:14:49,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:49,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:49,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:49,136 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.6) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 05:14:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:49,304 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-11-19 05:14:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:14:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2023-11-19 05:14:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:49,315 INFO L225 Difference]: With dead ends: 50 [2023-11-19 05:14:49,316 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 05:14:49,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:14:49,326 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:49,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 05:14:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-11-19 05:14:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.565217391304348) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:14:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-19 05:14:49,370 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 6 [2023-11-19 05:14:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:49,370 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-19 05:14:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 05:14:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-19 05:14:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:14:49,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:49,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:49,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:14:49,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:49,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash -854203139, now seen corresponding path program 1 times [2023-11-19 05:14:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:49,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210855039] [2023-11-19 05:14:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:49,431 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 05:14:49,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:49,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210855039] [2023-11-19 05:14:49,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210855039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:49,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:49,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:49,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972883342] [2023-11-19 05:14:49,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:49,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:49,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:49,436 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 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 05:14:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:49,476 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-11-19 05:14:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:14:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 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 05:14:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:49,478 INFO L225 Difference]: With dead ends: 33 [2023-11-19 05:14:49,478 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 05:14:49,478 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 05:14:49,480 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:49,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 05:14:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-19 05:14:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:14:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-11-19 05:14:49,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2023-11-19 05:14:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:49,491 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-11-19 05:14:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 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 05:14:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-11-19 05:14:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:14:49,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:49,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:49,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:14:49,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:49,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -711742670, now seen corresponding path program 1 times [2023-11-19 05:14:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:49,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830642999] [2023-11-19 05:14:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:49,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:49,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830642999] [2023-11-19 05:14:49,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830642999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604891783] [2023-11-19 05:14:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:49,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:49,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:14:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:49,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:14:49,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:49,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604891783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:49,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634014451] [2023-11-19 05:14:49,897 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 05:14:49,897 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:49,903 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 05:14:49,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:49,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-19 05:14:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262078191] [2023-11-19 05:14:49,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:49,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:14:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:14:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:14:49,909 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 05:14:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:50,036 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-11-19 05:14:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:14:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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) Word has length 11 [2023-11-19 05:14:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:50,039 INFO L225 Difference]: With dead ends: 38 [2023-11-19 05:14:50,040 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 05:14:50,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:14:50,043 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:50,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 61 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 05:14:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-11-19 05:14:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.434782608695652) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:14:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-19 05:14:50,057 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2023-11-19 05:14:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:50,058 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-19 05:14:50,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 05:14:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-19 05:14:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:14:50,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:50,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:50,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:50,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 05:14:50,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:50,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1079336362, now seen corresponding path program 1 times [2023-11-19 05:14:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:50,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554818230] [2023-11-19 05:14:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:14:50,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554818230] [2023-11-19 05:14:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554818230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:50,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:50,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:14:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729747181] [2023-11-19 05:14:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:50,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:50,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:50,385 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:50,402 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-19 05:14:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 05:14:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:50,404 INFO L225 Difference]: With dead ends: 31 [2023-11-19 05:14:50,404 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 05:14:50,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:50,407 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:50,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 05:14:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-19 05:14:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:14:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-19 05:14:50,418 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2023-11-19 05:14:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:50,419 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-19 05:14:50,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-19 05:14:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:14:50,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:50,421 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:14:50,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:50,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1079337361, now seen corresponding path program 1 times [2023-11-19 05:14:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:50,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892142708] [2023-11-19 05:14:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:50,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:14:50,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:50,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892142708] [2023-11-19 05:14:50,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892142708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:50,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:50,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:14:50,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249150573] [2023-11-19 05:14:50,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:50,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:50,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:50,504 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:50,519 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-11-19 05:14:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 05:14:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:50,521 INFO L225 Difference]: With dead ends: 32 [2023-11-19 05:14:50,522 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 05:14:50,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:50,524 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:50,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 05:14:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-19 05:14:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:14:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-19 05:14:50,537 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2023-11-19 05:14:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:50,537 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-19 05:14:50,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-19 05:14:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:14:50,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:50,539 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:50,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:14:50,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:50,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash -900311093, now seen corresponding path program 1 times [2023-11-19 05:14:50,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:50,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008586636] [2023-11-19 05:14:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:50,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:14:50,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:50,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008586636] [2023-11-19 05:14:50,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008586636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:50,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:50,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:14:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9912954] [2023-11-19 05:14:50,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:50,656 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:50,681 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-11-19 05:14:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:14:50,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-19 05:14:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:50,683 INFO L225 Difference]: With dead ends: 51 [2023-11-19 05:14:50,684 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 05:14:50,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:50,686 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:50,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 05:14:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-19 05:14:50,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:14:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-19 05:14:50,698 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2023-11-19 05:14:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:50,698 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-19 05:14:50,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-19 05:14:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:14:50,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:50,700 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:50,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:14:50,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:50,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:50,701 INFO L85 PathProgramCache]: Analyzing trace with hash -900280117, now seen corresponding path program 1 times [2023-11-19 05:14:50,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:50,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130375928] [2023-11-19 05:14:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:50,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:14:50,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130375928] [2023-11-19 05:14:50,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130375928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:50,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:50,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652602104] [2023-11-19 05:14:50,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:50,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:14:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:14:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:14:50,748 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:50,784 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-11-19 05:14:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:14:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-19 05:14:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:50,787 INFO L225 Difference]: With dead ends: 49 [2023-11-19 05:14:50,787 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 05:14:50,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:50,789 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:50,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 05:14:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-11-19 05:14:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:14:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-11-19 05:14:50,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 16 [2023-11-19 05:14:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:50,803 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-11-19 05:14:50,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:14:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-11-19 05:14:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 05:14:50,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:50,806 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:50,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:14:50,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:50,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:50,807 INFO L85 PathProgramCache]: Analyzing trace with hash 126445262, now seen corresponding path program 1 times [2023-11-19 05:14:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498585925] [2023-11-19 05:14:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:14:50,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498585925] [2023-11-19 05:14:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498585925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730598071] [2023-11-19 05:14:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:50,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:50,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:51,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:14:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:51,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:14:51,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:14:51,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:14:51,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730598071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:51,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:14:51,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2023-11-19 05:14:51,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934487980] [2023-11-19 05:14:51,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:51,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:14:51,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:14:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:14:51,150 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:14:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:51,223 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-11-19 05:14:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:14:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-11-19 05:14:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:51,225 INFO L225 Difference]: With dead ends: 37 [2023-11-19 05:14:51,225 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 05:14:51,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:14:51,232 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:51,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 05:14:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-19 05:14:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:14:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-19 05:14:51,255 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 27 [2023-11-19 05:14:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:51,255 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-19 05:14:51,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:14:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-19 05:14:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:14:51,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:51,257 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:51,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:51,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 05:14:51,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:51,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash 244561349, now seen corresponding path program 1 times [2023-11-19 05:14:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645182302] [2023-11-19 05:14:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:14:51,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645182302] [2023-11-19 05:14:51,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645182302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477674938] [2023-11-19 05:14:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:51,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:51,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:51,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:51,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:14:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:51,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:14:51,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:14:51,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:14:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477674938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1102950191] [2023-11-19 05:14:52,096 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:14:52,097 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:52,125 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 05:14:52,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:52,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-19 05:14:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946547687] [2023-11-19 05:14:52,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:52,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:14:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:14:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:14:52,144 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:14:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:52,376 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-11-19 05:14:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:14:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-11-19 05:14:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:52,382 INFO L225 Difference]: With dead ends: 95 [2023-11-19 05:14:52,382 INFO L226 Difference]: Without dead ends: 71 [2023-11-19 05:14:52,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-19 05:14:52,388 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:52,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 109 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-19 05:14:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2023-11-19 05:14:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:14:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-11-19 05:14:52,431 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 30 [2023-11-19 05:14:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:52,431 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-11-19 05:14:52,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:14:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-11-19 05:14:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 05:14:52,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:52,435 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 05:14:52,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:52,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 05:14:52,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:52,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1865011785, now seen corresponding path program 2 times [2023-11-19 05:14:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:52,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402874136] [2023-11-19 05:14:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:52,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-19 05:14:52,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402874136] [2023-11-19 05:14:52,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402874136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495817023] [2023-11-19 05:14:52,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:14:52,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:52,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:52,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:52,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:14:52,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:14:52,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:14:52,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:14:52,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 05:14:52,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 05:14:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495817023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:53,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879777652] [2023-11-19 05:14:53,171 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:14:53,171 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:53,171 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 05:14:53,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:53,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-19 05:14:53,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737441495] [2023-11-19 05:14:53,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:53,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:14:53,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:14:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:14:53,177 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:14:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:53,501 INFO L93 Difference]: Finished difference Result 179 states and 216 transitions. [2023-11-19 05:14:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 05:14:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2023-11-19 05:14:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:53,504 INFO L225 Difference]: With dead ends: 179 [2023-11-19 05:14:53,505 INFO L226 Difference]: Without dead ends: 154 [2023-11-19 05:14:53,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2023-11-19 05:14:53,508 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:53,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 134 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-19 05:14:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 72. [2023-11-19 05:14:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:14:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-11-19 05:14:53,548 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 66 [2023-11-19 05:14:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:53,551 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-11-19 05:14:53,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:14:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-11-19 05:14:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-19 05:14:53,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:53,557 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-11-19 05:14:53,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:14:53,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:53,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash 980190047, now seen corresponding path program 3 times [2023-11-19 05:14:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:53,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395911269] [2023-11-19 05:14:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:53,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 89 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-19 05:14:54,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395911269] [2023-11-19 05:14:54,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395911269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555453263] [2023-11-19 05:14:54,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:14:54,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:54,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:54,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:14:54,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:14:54,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:14:54,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:14:54,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 48 proven. 5 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-19 05:14:54,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 48 proven. 5 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-19 05:14:54,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555453263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:54,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [833014596] [2023-11-19 05:14:54,653 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:14:54,653 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:54,654 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 05:14:54,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-11-19 05:14:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388402024] [2023-11-19 05:14:54,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:54,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 05:14:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:54,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 05:14:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-11-19 05:14:54,663 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:14:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:55,309 INFO L93 Difference]: Finished difference Result 208 states and 253 transitions. [2023-11-19 05:14:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 05:14:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 78 [2023-11-19 05:14:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:55,312 INFO L225 Difference]: With dead ends: 208 [2023-11-19 05:14:55,312 INFO L226 Difference]: Without dead ends: 149 [2023-11-19 05:14:55,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 05:14:55,315 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:55,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 209 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:14:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-19 05:14:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2023-11-19 05:14:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.119047619047619) internal successors, (94), 84 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:14:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-11-19 05:14:55,333 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 78 [2023-11-19 05:14:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:55,333 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-11-19 05:14:55,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:14:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-11-19 05:14:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 05:14:55,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:55,336 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-11-19 05:14:55,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:55,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:14:55,558 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:55,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash 883557463, now seen corresponding path program 4 times [2023-11-19 05:14:55,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:55,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769867542] [2023-11-19 05:14:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:55,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 179 proven. 23 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-19 05:14:56,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:56,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769867542] [2023-11-19 05:14:56,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769867542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:56,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939828600] [2023-11-19 05:14:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:14:56,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:56,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:56,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:56,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:14:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:56,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 05:14:56,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 167 proven. 35 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-19 05:14:56,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 167 proven. 35 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-19 05:14:57,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939828600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:57,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961416375] [2023-11-19 05:14:57,094 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:14:57,094 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:57,095 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 05:14:57,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:57,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2023-11-19 05:14:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171322765] [2023-11-19 05:14:57,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 05:14:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 05:14:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:14:57,098 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:14:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:57,349 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2023-11-19 05:14:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 05:14:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 100 [2023-11-19 05:14:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:57,351 INFO L225 Difference]: With dead ends: 139 [2023-11-19 05:14:57,351 INFO L226 Difference]: Without dead ends: 96 [2023-11-19 05:14:57,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 182 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-11-19 05:14:57,353 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:57,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 188 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-19 05:14:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-19 05:14:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:14:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2023-11-19 05:14:57,367 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 100 [2023-11-19 05:14:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:57,368 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2023-11-19 05:14:57,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:14:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2023-11-19 05:14:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:14:57,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:57,370 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-11-19 05:14:57,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:57,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:14:57,590 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:14:57,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1225871720, now seen corresponding path program 5 times [2023-11-19 05:14:57,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:57,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849541803] [2023-11-19 05:14:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:57,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-19 05:14:58,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:58,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849541803] [2023-11-19 05:14:58,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849541803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:58,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735556729] [2023-11-19 05:14:58,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:14:58,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:58,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:58,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:14:58,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-19 05:14:58,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:14:58,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:14:58,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 132 proven. 68 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-11-19 05:14:58,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 132 proven. 68 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-11-19 05:14:58,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735556729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:58,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637186834] [2023-11-19 05:14:58,770 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:14:58,770 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:58,771 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 05:14:58,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2023-11-19 05:14:58,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320463225] [2023-11-19 05:14:58,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:58,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-19 05:14:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-19 05:14:58,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 05:14:58,774 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 29 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:14:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:59,985 INFO L93 Difference]: Finished difference Result 211 states and 241 transitions. [2023-11-19 05:14:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-19 05:14:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 29 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 103 [2023-11-19 05:14:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:59,987 INFO L225 Difference]: With dead ends: 211 [2023-11-19 05:14:59,987 INFO L226 Difference]: Without dead ends: 164 [2023-11-19 05:14:59,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1620, Invalid=5186, Unknown=0, NotChecked=0, Total=6806 [2023-11-19 05:14:59,992 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 166 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:59,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 166 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:14:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-19 05:15:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2023-11-19 05:15:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 142 states have (on average 1.1267605633802817) internal successors, (160), 142 states have internal predecessors, (160), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 8 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:15:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2023-11-19 05:15:00,011 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 103 [2023-11-19 05:15:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:00,011 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2023-11-19 05:15:00,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 29 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:15:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2023-11-19 05:15:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-19 05:15:00,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:00,014 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 10, 9, 9, 9, 9, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1] [2023-11-19 05:15:00,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:00,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:00,227 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:15:00,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash -350870837, now seen corresponding path program 6 times [2023-11-19 05:15:00,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:00,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799984217] [2023-11-19 05:15:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:00,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 540 proven. 427 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2023-11-19 05:15:01,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799984217] [2023-11-19 05:15:01,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799984217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913301062] [2023-11-19 05:15:01,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:15:01,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:01,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:01,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:01,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:15:01,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:15:01,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:15:01,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 05:15:01,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 434 proven. 70 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2023-11-19 05:15:01,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 434 proven. 70 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2023-11-19 05:15:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913301062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045815797] [2023-11-19 05:15:02,887 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:15:02,888 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:02,888 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 05:15:02,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:15:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17, 17] total 63 [2023-11-19 05:15:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036658174] [2023-11-19 05:15:02,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:02,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-19 05:15:02,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:02,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-19 05:15:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=3323, Unknown=0, NotChecked=0, Total=3906 [2023-11-19 05:15:02,897 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 57 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:15:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:05,295 INFO L93 Difference]: Finished difference Result 394 states and 459 transitions. [2023-11-19 05:15:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-19 05:15:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 57 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 164 [2023-11-19 05:15:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:05,299 INFO L225 Difference]: With dead ends: 394 [2023-11-19 05:15:05,299 INFO L226 Difference]: Without dead ends: 260 [2023-11-19 05:15:05,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3114, Invalid=10928, Unknown=0, NotChecked=0, Total=14042 [2023-11-19 05:15:05,311 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 436 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:05,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 232 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:15:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-19 05:15:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 222. [2023-11-19 05:15:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 210 states have (on average 1.1142857142857143) internal successors, (234), 210 states have internal predecessors, (234), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 9 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-19 05:15:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 246 transitions. [2023-11-19 05:15:05,359 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 246 transitions. Word has length 164 [2023-11-19 05:15:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:05,359 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 246 transitions. [2023-11-19 05:15:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 57 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:15:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 246 transitions. [2023-11-19 05:15:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-19 05:15:05,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:05,364 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 37, 11, 10, 10, 10, 10, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2023-11-19 05:15:05,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:05,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:05,586 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:15:05,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:05,586 INFO L85 PathProgramCache]: Analyzing trace with hash -392438139, now seen corresponding path program 7 times [2023-11-19 05:15:05,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:05,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034662110] [2023-11-19 05:15:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:05,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2707 backedges. 1228 proven. 785 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2023-11-19 05:15:07,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034662110] [2023-11-19 05:15:07,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034662110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660834216] [2023-11-19 05:15:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:15:07,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:07,264 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:15:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:07,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 05:15:07,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2707 backedges. 1244 proven. 765 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2023-11-19 05:15:07,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2707 backedges. 1244 proven. 765 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2023-11-19 05:15:11,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660834216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:11,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504331372] [2023-11-19 05:15:11,887 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:15:11,888 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:11,888 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 05:15:11,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:15:11,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 38 [2023-11-19 05:15:11,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722326167] [2023-11-19 05:15:11,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:11,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-19 05:15:11,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-19 05:15:11,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 05:15:11,896 INFO L87 Difference]: Start difference. First operand 222 states and 246 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 31 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:15:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:13,153 INFO L93 Difference]: Finished difference Result 511 states and 569 transitions. [2023-11-19 05:15:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-19 05:15:13,154 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 31 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 214 [2023-11-19 05:15:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:13,157 INFO L225 Difference]: With dead ends: 511 [2023-11-19 05:15:13,157 INFO L226 Difference]: Without dead ends: 342 [2023-11-19 05:15:13,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 394 SyntacticMatches, 32 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1206, Invalid=5934, Unknown=0, NotChecked=0, Total=7140 [2023-11-19 05:15:13,162 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 155 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:13,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 221 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:15:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-19 05:15:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 282. [2023-11-19 05:15:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 267 states have (on average 1.1123595505617978) internal successors, (297), 267 states have internal predecessors, (297), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 05:15:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 312 transitions. [2023-11-19 05:15:13,195 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 312 transitions. Word has length 214 [2023-11-19 05:15:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:13,195 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 312 transitions. [2023-11-19 05:15:13,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 31 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:15:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 312 transitions. [2023-11-19 05:15:13,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-19 05:15:13,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:13,200 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1] [2023-11-19 05:15:13,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:13,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:13,423 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:15:13,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash 797378583, now seen corresponding path program 8 times [2023-11-19 05:15:13,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:13,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906212119] [2023-11-19 05:15:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:13,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3114 backedges. 1269 proven. 66 refuted. 0 times theorem prover too weak. 1779 trivial. 0 not checked. [2023-11-19 05:15:14,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906212119] [2023-11-19 05:15:14,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906212119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917011387] [2023-11-19 05:15:14,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:15:14,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:14,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:14,338 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:14,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:15:14,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-19 05:15:14,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:15:14,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 05:15:14,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3114 backedges. 1350 proven. 746 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2023-11-19 05:15:15,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3114 backedges. 1350 proven. 746 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2023-11-19 05:15:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917011387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821617844] [2023-11-19 05:15:16,735 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:15:16,736 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:16,736 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 05:15:16,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:15:16,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 59 [2023-11-19 05:15:16,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936732413] [2023-11-19 05:15:16,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:16,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-19 05:15:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-19 05:15:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2023-11-19 05:15:16,747 INFO L87 Difference]: Start difference. First operand 282 states and 312 transitions. Second operand has 59 states, 59 states have (on average 2.305084745762712) internal successors, (136), 50 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-19 05:15:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:21,804 INFO L93 Difference]: Finished difference Result 818 states and 933 transitions. [2023-11-19 05:15:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-11-19 05:15:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.305084745762712) internal successors, (136), 50 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 224 [2023-11-19 05:15:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:21,809 INFO L225 Difference]: With dead ends: 818 [2023-11-19 05:15:21,809 INFO L226 Difference]: Without dead ends: 502 [2023-11-19 05:15:21,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13906 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6822, Invalid=31398, Unknown=0, NotChecked=0, Total=38220 [2023-11-19 05:15:21,842 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 498 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:21,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 272 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:15:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-19 05:15:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 366. [2023-11-19 05:15:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 349 states have (on average 1.1174785100286533) internal successors, (390), 349 states have internal predecessors, (390), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 14 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:15:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 407 transitions. [2023-11-19 05:15:21,911 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 407 transitions. Word has length 224 [2023-11-19 05:15:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:21,912 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 407 transitions. [2023-11-19 05:15:21,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.305084745762712) internal successors, (136), 50 states have internal predecessors, (136), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2023-11-19 05:15:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 407 transitions. [2023-11-19 05:15:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-11-19 05:15:21,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:21,922 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-11-19 05:15:21,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:22,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:22,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:15:22,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1648365257, now seen corresponding path program 9 times [2023-11-19 05:15:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:22,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185309750] [2023-11-19 05:15:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7379 backedges. 4394 proven. 429 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2023-11-19 05:15:24,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:24,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185309750] [2023-11-19 05:15:24,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185309750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:24,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282931744] [2023-11-19 05:15:24,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:15:24,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:24,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:24,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:24,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 05:15:24,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:15:24,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:15:24,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 05:15:24,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7379 backedges. 2434 proven. 330 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2023-11-19 05:15:25,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7379 backedges. 2434 proven. 330 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2023-11-19 05:15:28,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282931744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:28,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167071403] [2023-11-19 05:15:28,047 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-19 05:15:28,047 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:15:28,048 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 05:15:28,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:15:28,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 33] total 102 [2023-11-19 05:15:28,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923316051] [2023-11-19 05:15:28,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:28,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-11-19 05:15:28,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-11-19 05:15:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1420, Invalid=8882, Unknown=0, NotChecked=0, Total=10302 [2023-11-19 05:15:28,058 INFO L87 Difference]: Start difference. First operand 366 states and 407 transitions. Second operand has 102 states, 102 states have (on average 1.9313725490196079) internal successors, (197), 94 states have internal predecessors, (197), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 05:15:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:34,335 INFO L93 Difference]: Finished difference Result 952 states and 1130 transitions. [2023-11-19 05:15:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-11-19 05:15:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9313725490196079) internal successors, (197), 94 states have internal predecessors, (197), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 318 [2023-11-19 05:15:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:34,341 INFO L225 Difference]: With dead ends: 952 [2023-11-19 05:15:34,341 INFO L226 Difference]: Without dead ends: 698 [2023-11-19 05:15:34,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18477 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=11165, Invalid=49105, Unknown=0, NotChecked=0, Total=60270 [2023-11-19 05:15:34,351 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 642 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:34,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 400 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:15:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2023-11-19 05:15:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 420. [2023-11-19 05:15:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 405 states have (on average 1.0962962962962963) internal successors, (444), 405 states have internal predecessors, (444), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 05:15:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 459 transitions. [2023-11-19 05:15:34,432 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 459 transitions. Word has length 318 [2023-11-19 05:15:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:34,433 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 459 transitions. [2023-11-19 05:15:34,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9313725490196079) internal successors, (197), 94 states have internal predecessors, (197), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 05:15:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 459 transitions. [2023-11-19 05:15:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-19 05:15:34,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:34,443 INFO L195 NwaCegarLoop]: trace histogram [81, 81, 81, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-11-19 05:15:34,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:34,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ed09fe-9f4e-4a14-9c31-c4b1db9fe7ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 05:15:34,656 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 05:15:34,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1323758088, now seen corresponding path program 10 times [2023-11-19 05:15:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:15:34,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753536288] [2023-11-19 05:15:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:15:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat