./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91 --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 e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:02:46,205 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:02:46,330 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-25 00:02:46,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:02:46,349 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:02:46,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:02:46,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:02:46,407 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:02:46,408 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:02:46,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:02:46,410 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:02:46,410 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:02:46,411 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:02:46,412 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:02:46,412 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:02:46,413 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:02:46,414 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:02:46,414 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:02:46,415 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:02:46,416 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:02:46,416 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:02:46,417 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:02:46,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:02:46,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:02:46,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:02:46,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:02:46,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:02:46,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:02:46,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:02:46,422 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-25 00:02:46,424 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:02:46,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:02:46,425 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:02:46,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:02:46,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:02:46,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:02:46,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:46,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:02:46,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:02:46,427 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:02:46,427 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:02:46,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:02:46,428 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:02:46,429 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:02:46,429 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:02:46,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:02:46,430 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_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 [2023-11-25 00:02:46,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:02:46,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:02:46,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:02:46,838 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:02:46,840 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:02:46,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2023-11-25 00:02:50,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:02:50,465 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:02:50,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2023-11-25 00:02:50,473 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/data/d862a3521/2ab540ff77f24d77b70d16f51a9851d3/FLAG9ca13e6c2 [2023-11-25 00:02:50,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/data/d862a3521/2ab540ff77f24d77b70d16f51a9851d3 [2023-11-25 00:02:50,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:02:50,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:02:50,504 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:50,504 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:02:50,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:02:50,512 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133bbaf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50, skipping insertion in model container [2023-11-25 00:02:50,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:02:50,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:50,722 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:50,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:50,755 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:50,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50 WrapperNode [2023-11-25 00:02:50,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:50,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:50,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:50,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:50,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,787 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 12 [2023-11-25 00:02:50,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:50,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:50,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:50,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:50,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,799 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,801 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,809 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:50,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:50,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:50,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:50,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (1/1) ... [2023-11-25 00:02:50,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:50,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:50,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:50,887 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-11-25 00:02:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-11-25 00:02:50,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:50,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:50,943 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:50,946 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:51,054 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:51,070 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:51,070 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-25 00:02:51,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:51 BoogieIcfgContainer [2023-11-25 00:02:51,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:51,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:51,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:51,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:51,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:02:50" (1/3) ... [2023-11-25 00:02:51,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233173ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:51, skipping insertion in model container [2023-11-25 00:02:51,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:50" (2/3) ... [2023-11-25 00:02:51,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233173ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:51, skipping insertion in model container [2023-11-25 00:02:51,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:51" (3/3) ... [2023-11-25 00:02:51,080 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2023-11-25 00:02:51,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:51,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-25 00:02:51,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:51,150 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;@1a0ec739, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:51,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-25 00:02:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:02:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:02:51,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:51,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-25 00:02:51,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:51,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:51,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1970913107, now seen corresponding path program 1 times [2023-11-25 00:02:51,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:51,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130939208] [2023-11-25 00:02:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:51,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:51,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:51,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130939208] [2023-11-25 00:02:51,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130939208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:51,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53263593] [2023-11-25 00:02:51,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:51,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:02:51,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:02:51,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:02:51,421 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 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) [2023-11-25 00:02:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:51,588 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-11-25 00:02:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:02:51,594 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 [2023-11-25 00:02:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:51,604 INFO L225 Difference]: With dead ends: 41 [2023-11-25 00:02:51,604 INFO L226 Difference]: Without dead ends: 33 [2023-11-25 00:02:51,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:51,632 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:51,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 58 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-25 00:02:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-11-25 00:02:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:02:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-25 00:02:51,698 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 6 [2023-11-25 00:02:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:51,699 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-25 00:02:51,700 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) [2023-11-25 00:02:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-25 00:02:51,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:02:51,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:51,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:51,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:02:51,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:51,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash 968764211, now seen corresponding path program 1 times [2023-11-25 00:02:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:51,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928992079] [2023-11-25 00:02:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:51,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:51,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:51,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928992079] [2023-11-25 00:02:51,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928992079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:51,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:51,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:02:51,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38884613] [2023-11-25 00:02:51,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:51,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:02:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:51,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:02:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:02:51,827 INFO L87 Difference]: Start difference. First operand 28 states and 34 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) [2023-11-25 00:02:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:51,910 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-11-25 00:02:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:02:51,911 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 [2023-11-25 00:02:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:51,913 INFO L225 Difference]: With dead ends: 46 [2023-11-25 00:02:51,913 INFO L226 Difference]: Without dead ends: 45 [2023-11-25 00:02:51,914 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 [2023-11-25 00:02:51,916 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:51,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-25 00:02:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2023-11-25 00:02:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-25 00:02:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-25 00:02:51,935 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2023-11-25 00:02:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:51,935 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-25 00:02:51,936 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) [2023-11-25 00:02:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-25 00:02:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:02:51,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:51,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:51,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:02:51,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:51,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:51,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1952741066, now seen corresponding path program 1 times [2023-11-25 00:02:51,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:51,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094679506] [2023-11-25 00:02:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:51,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:52,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094679506] [2023-11-25 00:02:52,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094679506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:52,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588336286] [2023-11-25 00:02:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:52,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:52,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:52,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:02:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:52,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:02:52,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:52,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:52,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588336286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:52,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652288150] [2023-11-25 00:02:52,373 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-25 00:02:52,373 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:52,379 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) [2023-11-25 00:02:52,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:52,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-25 00:02:52,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917742617] [2023-11-25 00:02:52,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:52,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:02:52,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:02:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:02:52,385 INFO L87 Difference]: Start difference. First operand 40 states and 50 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) [2023-11-25 00:02:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:52,709 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2023-11-25 00:02:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-25 00:02:52,716 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 [2023-11-25 00:02:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:52,721 INFO L225 Difference]: With dead ends: 95 [2023-11-25 00:02:52,721 INFO L226 Difference]: Without dead ends: 94 [2023-11-25 00:02:52,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:02:52,724 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:52,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 91 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:02:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-25 00:02:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2023-11-25 00:02:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 58 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-25 00:02:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2023-11-25 00:02:52,764 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 11 [2023-11-25 00:02:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:52,765 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2023-11-25 00:02:52,765 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) [2023-11-25 00:02:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2023-11-25 00:02:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-25 00:02:52,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:52,766 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:52,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-25 00:02:52,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:52,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:52,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:52,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1222392158, now seen corresponding path program 1 times [2023-11-25 00:02:52,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:52,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214523234] [2023-11-25 00:02:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:52,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:53,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214523234] [2023-11-25 00:02:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214523234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:53,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:53,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:02:53,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657255099] [2023-11-25 00:02:53,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:53,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:02:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:53,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:02:53,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:02:53,050 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-25 00:02:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:53,088 INFO L93 Difference]: Finished difference Result 116 states and 165 transitions. [2023-11-25 00:02:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:02:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2023-11-25 00:02:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:53,092 INFO L225 Difference]: With dead ends: 116 [2023-11-25 00:02:53,092 INFO L226 Difference]: Without dead ends: 115 [2023-11-25 00:02:53,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:02:53,097 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:53,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:02:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-25 00:02:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2023-11-25 00:02:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 74 states have internal predecessors, (91), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2023-11-25 00:02:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2023-11-25 00:02:53,139 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 14 [2023-11-25 00:02:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:53,140 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2023-11-25 00:02:53,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-25 00:02:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2023-11-25 00:02:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-25 00:02:53,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:53,146 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:53,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:02:53,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:53,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash -760548722, now seen corresponding path program 1 times [2023-11-25 00:02:53,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:53,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587822223] [2023-11-25 00:02:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:53,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587822223] [2023-11-25 00:02:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587822223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:53,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:53,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:02:53,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825621853] [2023-11-25 00:02:53,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:02:53,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:02:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:02:53,225 INFO L87 Difference]: Start difference. First operand 98 states and 126 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) [2023-11-25 00:02:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:53,251 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2023-11-25 00:02:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:02:53,258 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 [2023-11-25 00:02:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:53,259 INFO L225 Difference]: With dead ends: 98 [2023-11-25 00:02:53,260 INFO L226 Difference]: Without dead ends: 97 [2023-11-25 00:02:53,260 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 [2023-11-25 00:02:53,261 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 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 [2023-11-25 00:02:53,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:02:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-25 00:02:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-25 00:02:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 73 states have internal predecessors, (85), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2023-11-25 00:02:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2023-11-25 00:02:53,279 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 15 [2023-11-25 00:02:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:53,280 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2023-11-25 00:02:53,280 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) [2023-11-25 00:02:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2023-11-25 00:02:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-25 00:02:53,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:53,281 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:53,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:02:53,282 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:53,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash -942664753, now seen corresponding path program 1 times [2023-11-25 00:02:53,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:53,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659984661] [2023-11-25 00:02:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:53,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:53,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659984661] [2023-11-25 00:02:53,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659984661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:53,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:53,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:02:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704542437] [2023-11-25 00:02:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:53,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:53,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:53,401 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:02:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:53,563 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2023-11-25 00:02:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:02:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-25 00:02:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:53,569 INFO L225 Difference]: With dead ends: 136 [2023-11-25 00:02:53,569 INFO L226 Difference]: Without dead ends: 135 [2023-11-25 00:02:53,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:02:53,574 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 68 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-25 00:02:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 125. [2023-11-25 00:02:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 97 states have internal predecessors, (106), 22 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (32), 20 states have call predecessors, (32), 19 states have call successors, (32) [2023-11-25 00:02:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2023-11-25 00:02:53,618 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 19 [2023-11-25 00:02:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:53,618 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2023-11-25 00:02:53,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:02:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2023-11-25 00:02:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:02:53,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:53,620 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:53,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:02:53,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:53,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash 842163767, now seen corresponding path program 1 times [2023-11-25 00:02:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:53,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783820936] [2023-11-25 00:02:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:53,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:53,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783820936] [2023-11-25 00:02:53,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783820936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:53,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:53,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:02:53,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615113301] [2023-11-25 00:02:53,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:53,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:53,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:53,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:53,695 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:02:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:53,840 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2023-11-25 00:02:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:02:53,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-25 00:02:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:53,843 INFO L225 Difference]: With dead ends: 155 [2023-11-25 00:02:53,843 INFO L226 Difference]: Without dead ends: 154 [2023-11-25 00:02:53,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:02:53,845 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:53,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 67 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-25 00:02:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2023-11-25 00:02:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 111 states have internal predecessors, (121), 25 states have call successors, (25), 8 states have call predecessors, (25), 13 states have return successors, (37), 23 states have call predecessors, (37), 22 states have call successors, (37) [2023-11-25 00:02:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2023-11-25 00:02:53,870 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 20 [2023-11-25 00:02:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:53,871 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2023-11-25 00:02:53,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:02:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2023-11-25 00:02:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:02:53,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:53,872 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:53,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:02:53,873 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:53,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1773314618, now seen corresponding path program 2 times [2023-11-25 00:02:53,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:53,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655703321] [2023-11-25 00:02:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:53,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:53,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655703321] [2023-11-25 00:02:53,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655703321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:53,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013417221] [2023-11-25 00:02:53,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:02:53,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:53,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:53,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:02:54,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-25 00:02:54,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:54,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:02:54,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:54,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:54,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013417221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:54,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681332466] [2023-11-25 00:02:54,199 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-25 00:02:54,200 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:54,200 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) [2023-11-25 00:02:54,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:54,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-25 00:02:54,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057781434] [2023-11-25 00:02:54,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:54,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-25 00:02:54,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-25 00:02:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:02:54,207 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:54,732 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2023-11-25 00:02:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-25 00:02:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-25 00:02:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:54,736 INFO L225 Difference]: With dead ends: 214 [2023-11-25 00:02:54,736 INFO L226 Difference]: Without dead ends: 213 [2023-11-25 00:02:54,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:02:54,739 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:54,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 107 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:02:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-25 00:02:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 197. [2023-11-25 00:02:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.177304964539007) internal successors, (166), 153 states have internal predecessors, (166), 34 states have call successors, (34), 11 states have call predecessors, (34), 19 states have return successors, (52), 32 states have call predecessors, (52), 31 states have call successors, (52) [2023-11-25 00:02:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 252 transitions. [2023-11-25 00:02:54,770 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 252 transitions. Word has length 24 [2023-11-25 00:02:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:54,771 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 252 transitions. [2023-11-25 00:02:54,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:02:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 252 transitions. [2023-11-25 00:02:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-25 00:02:54,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:54,773 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1] [2023-11-25 00:02:54,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:54,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:54,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:54,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:54,975 INFO L85 PathProgramCache]: Analyzing trace with hash 719016723, now seen corresponding path program 2 times [2023-11-25 00:02:54,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:54,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723740795] [2023-11-25 00:02:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:54,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:55,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723740795] [2023-11-25 00:02:55,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723740795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014815206] [2023-11-25 00:02:55,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:02:55,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:55,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:55,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:55,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:02:55,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-25 00:02:55,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:55,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-25 00:02:55,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:55,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:55,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014815206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15753264] [2023-11-25 00:02:55,704 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-25 00:02:55,704 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:55,704 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) [2023-11-25 00:02:55,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:55,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-25 00:02:55,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833735777] [2023-11-25 00:02:55,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:55,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-25 00:02:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-25 00:02:55,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:02:55,712 INFO L87 Difference]: Start difference. First operand 197 states and 252 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 14 states have internal predecessors, (41), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:56,307 INFO L93 Difference]: Finished difference Result 318 states and 413 transitions. [2023-11-25 00:02:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-25 00:02:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 14 states have internal predecessors, (41), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-25 00:02:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:56,314 INFO L225 Difference]: With dead ends: 318 [2023-11-25 00:02:56,314 INFO L226 Difference]: Without dead ends: 317 [2023-11-25 00:02:56,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-11-25 00:02:56,319 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 306 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:56,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 211 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:02:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-25 00:02:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 305. [2023-11-25 00:02:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 219 states have (on average 1.1689497716894977) internal successors, (256), 237 states have internal predecessors, (256), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2023-11-25 00:02:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 390 transitions. [2023-11-25 00:02:56,366 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 390 transitions. Word has length 26 [2023-11-25 00:02:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:56,367 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 390 transitions. [2023-11-25 00:02:56,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 14 states have internal predecessors, (41), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 390 transitions. [2023-11-25 00:02:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-25 00:02:56,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:56,375 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:56,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:56,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:56,582 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:56,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash 407401687, now seen corresponding path program 1 times [2023-11-25 00:02:56,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:56,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443479019] [2023-11-25 00:02:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:56,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:56,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:56,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443479019] [2023-11-25 00:02:56,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443479019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:56,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:56,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:56,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999278067] [2023-11-25 00:02:56,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:56,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:02:56,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:56,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:02:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:02:56,687 INFO L87 Difference]: Start difference. First operand 305 states and 390 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:56,732 INFO L93 Difference]: Finished difference Result 305 states and 390 transitions. [2023-11-25 00:02:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:02:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-25 00:02:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:56,735 INFO L225 Difference]: With dead ends: 305 [2023-11-25 00:02:56,736 INFO L226 Difference]: Without dead ends: 304 [2023-11-25 00:02:56,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:56,737 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:56,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:02:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-25 00:02:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2023-11-25 00:02:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 219 states have (on average 1.091324200913242) internal successors, (239), 236 states have internal predecessors, (239), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2023-11-25 00:02:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 373 transitions. [2023-11-25 00:02:56,777 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 373 transitions. Word has length 30 [2023-11-25 00:02:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:56,777 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 373 transitions. [2023-11-25 00:02:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 373 transitions. [2023-11-25 00:02:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-25 00:02:56,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:56,783 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:56,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-25 00:02:56,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:56,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash 944446454, now seen corresponding path program 1 times [2023-11-25 00:02:56,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:56,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020642465] [2023-11-25 00:02:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:56,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:56,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:56,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020642465] [2023-11-25 00:02:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020642465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:56,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:56,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:02:56,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909719386] [2023-11-25 00:02:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:56,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:02:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:02:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:02:56,903 INFO L87 Difference]: Start difference. First operand 304 states and 373 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:57,070 INFO L93 Difference]: Finished difference Result 324 states and 397 transitions. [2023-11-25 00:02:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:02:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-25 00:02:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:57,074 INFO L225 Difference]: With dead ends: 324 [2023-11-25 00:02:57,074 INFO L226 Difference]: Without dead ends: 323 [2023-11-25 00:02:57,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:02:57,076 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:57,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 68 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-25 00:02:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2023-11-25 00:02:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 231 states have (on average 1.0952380952380953) internal successors, (253), 248 states have internal predecessors, (253), 55 states have call successors, (55), 18 states have call predecessors, (55), 32 states have return successors, (70), 53 states have call predecessors, (70), 52 states have call successors, (70) [2023-11-25 00:02:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 378 transitions. [2023-11-25 00:02:57,113 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 378 transitions. Word has length 35 [2023-11-25 00:02:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:57,113 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 378 transitions. [2023-11-25 00:02:57,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 378 transitions. [2023-11-25 00:02:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-25 00:02:57,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:57,115 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:57,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-25 00:02:57,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:57,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash -786930960, now seen corresponding path program 1 times [2023-11-25 00:02:57,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:57,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452673180] [2023-11-25 00:02:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:57,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:57,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452673180] [2023-11-25 00:02:57,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452673180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:57,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:57,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:02:57,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659981428] [2023-11-25 00:02:57,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:57,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:02:57,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:02:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:02:57,202 INFO L87 Difference]: Start difference. First operand 320 states and 378 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:57,359 INFO L93 Difference]: Finished difference Result 321 states and 378 transitions. [2023-11-25 00:02:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:02:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-11-25 00:02:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:57,363 INFO L225 Difference]: With dead ends: 321 [2023-11-25 00:02:57,363 INFO L226 Difference]: Without dead ends: 320 [2023-11-25 00:02:57,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:02:57,365 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:57,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 60 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:02:57,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-25 00:02:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2023-11-25 00:02:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 231 states have (on average 1.0865800865800865) internal successors, (251), 247 states have internal predecessors, (251), 55 states have call successors, (55), 18 states have call predecessors, (55), 32 states have return successors, (70), 53 states have call predecessors, (70), 52 states have call successors, (70) [2023-11-25 00:02:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 376 transitions. [2023-11-25 00:02:57,404 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 376 transitions. Word has length 36 [2023-11-25 00:02:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:57,404 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 376 transitions. [2023-11-25 00:02:57,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:02:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 376 transitions. [2023-11-25 00:02:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-25 00:02:57,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:57,407 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:57,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-25 00:02:57,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:57,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:57,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1087803791, now seen corresponding path program 3 times [2023-11-25 00:02:57,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:57,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016617578] [2023-11-25 00:02:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:57,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:02:57,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016617578] [2023-11-25 00:02:57,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016617578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865903294] [2023-11-25 00:02:57,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:02:57,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:57,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:57,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:02:57,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:02:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:57,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:02:57,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-25 00:02:57,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865903294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:57,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:02:57,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2023-11-25 00:02:57,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461819484] [2023-11-25 00:02:57,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:57,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:57,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:57,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:02:57,776 INFO L87 Difference]: Start difference. First operand 319 states and 376 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:02:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:57,869 INFO L93 Difference]: Finished difference Result 446 states and 558 transitions. [2023-11-25 00:02:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:02:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-11-25 00:02:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:57,873 INFO L225 Difference]: With dead ends: 446 [2023-11-25 00:02:57,873 INFO L226 Difference]: Without dead ends: 243 [2023-11-25 00:02:57,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-11-25 00:02:57,879 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:57,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:02:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-25 00:02:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2023-11-25 00:02:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 166 states have (on average 1.0783132530120483) internal successors, (179), 177 states have internal predecessors, (179), 39 states have call successors, (39), 14 states have call predecessors, (39), 23 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2023-11-25 00:02:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 267 transitions. [2023-11-25 00:02:57,911 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 267 transitions. Word has length 39 [2023-11-25 00:02:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:57,912 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 267 transitions. [2023-11-25 00:02:57,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:02:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 267 transitions. [2023-11-25 00:02:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-25 00:02:57,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:57,914 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:57,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:58,121 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:58,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash -144074125, now seen corresponding path program 2 times [2023-11-25 00:02:58,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:58,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69667439] [2023-11-25 00:02:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:58,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:58,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69667439] [2023-11-25 00:02:58,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69667439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:58,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341573172] [2023-11-25 00:02:58,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:02:58,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:58,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:58,248 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:58,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:02:58,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-25 00:02:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:58,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:02:58,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:58,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:02:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:02:58,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341573172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:02:58,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785179057] [2023-11-25 00:02:58,543 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-25 00:02:58,543 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:02:58,544 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) [2023-11-25 00:02:58,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:02:58,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-25 00:02:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83300310] [2023-11-25 00:02:58,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:02:58,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:02:58,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:02:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:02:58,549 INFO L87 Difference]: Start difference. First operand 229 states and 267 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:02:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:59,141 INFO L93 Difference]: Finished difference Result 284 states and 333 transitions. [2023-11-25 00:02:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-25 00:02:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2023-11-25 00:02:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:59,145 INFO L225 Difference]: With dead ends: 284 [2023-11-25 00:02:59,145 INFO L226 Difference]: Without dead ends: 283 [2023-11-25 00:02:59,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2023-11-25 00:02:59,148 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 102 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:59,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 104 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:02:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-25 00:02:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2023-11-25 00:02:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 205 states have (on average 1.078048780487805) internal successors, (221), 219 states have internal predecessors, (221), 48 states have call successors, (48), 17 states have call predecessors, (48), 29 states have return successors, (61), 46 states have call predecessors, (61), 46 states have call successors, (61) [2023-11-25 00:02:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 330 transitions. [2023-11-25 00:02:59,181 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 330 transitions. Word has length 40 [2023-11-25 00:02:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:59,182 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 330 transitions. [2023-11-25 00:02:59,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:02:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 330 transitions. [2023-11-25 00:02:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-25 00:02:59,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:59,185 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1] [2023-11-25 00:02:59,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:59,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-25 00:02:59,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:02:59,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash 17554611, now seen corresponding path program 3 times [2023-11-25 00:02:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:59,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896502827] [2023-11-25 00:02:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:59,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896502827] [2023-11-25 00:02:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896502827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:02:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194625038] [2023-11-25 00:02:59,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:02:59,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:59,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:59,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:02:59,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:02:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:02:59,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:02:59,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:00,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:00,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194625038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:00,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1027488941] [2023-11-25 00:03:00,990 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-25 00:03:00,990 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:00,991 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) [2023-11-25 00:03:00,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:00,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-11-25 00:03:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697748852] [2023-11-25 00:03:00,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:00,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-25 00:03:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:00,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-25 00:03:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-11-25 00:03:00,995 INFO L87 Difference]: Start difference. First operand 283 states and 330 transitions. Second operand has 48 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 26 states have internal predecessors, (89), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:02,748 INFO L93 Difference]: Finished difference Result 502 states and 622 transitions. [2023-11-25 00:03:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-25 00:03:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 26 states have internal predecessors, (89), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-25 00:03:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:02,753 INFO L225 Difference]: With dead ends: 502 [2023-11-25 00:03:02,753 INFO L226 Difference]: Without dead ends: 501 [2023-11-25 00:03:02,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2447, Invalid=5563, Unknown=0, NotChecked=0, Total=8010 [2023-11-25 00:03:02,758 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:02,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 325 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:03:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-11-25 00:03:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2023-11-25 00:03:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 361 states have (on average 1.077562326869806) internal successors, (389), 387 states have internal predecessors, (389), 84 states have call successors, (84), 29 states have call predecessors, (84), 53 states have return successors, (109), 82 states have call predecessors, (109), 82 states have call successors, (109) [2023-11-25 00:03:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 582 transitions. [2023-11-25 00:03:02,798 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 582 transitions. Word has length 56 [2023-11-25 00:03:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:02,799 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 582 transitions. [2023-11-25 00:03:02,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 26 states have internal predecessors, (89), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 582 transitions. [2023-11-25 00:03:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-25 00:03:02,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:02,801 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:02,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:03,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-25 00:03:03,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:03:03,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:03,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1489698870, now seen corresponding path program 3 times [2023-11-25 00:03:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:03,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382181571] [2023-11-25 00:03:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:03,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:03:03,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:03,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382181571] [2023-11-25 00:03:03,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382181571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:03,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870601842] [2023-11-25 00:03:03,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:03:03,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:03,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:03,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:03,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:03:03,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:03:03,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:03,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-25 00:03:03,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:03:03,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:03:03,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870601842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321251977] [2023-11-25 00:03:03,709 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-25 00:03:03,710 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:03,710 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) [2023-11-25 00:03:03,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:03,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-25 00:03:03,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612819611] [2023-11-25 00:03:03,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-25 00:03:03,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-25 00:03:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:03:03,715 INFO L87 Difference]: Start difference. First operand 499 states and 582 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 16 states have internal predecessors, (61), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:03:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:05,053 INFO L93 Difference]: Finished difference Result 608 states and 714 transitions. [2023-11-25 00:03:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-25 00:03:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 16 states have internal predecessors, (61), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2023-11-25 00:03:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:05,058 INFO L225 Difference]: With dead ends: 608 [2023-11-25 00:03:05,058 INFO L226 Difference]: Without dead ends: 607 [2023-11-25 00:03:05,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1544, Invalid=4936, Unknown=0, NotChecked=0, Total=6480 [2023-11-25 00:03:05,063 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 331 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:05,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 126 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2023-11-25 00:03:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2023-11-25 00:03:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 439 states have (on average 1.0774487471526195) internal successors, (473), 471 states have internal predecessors, (473), 102 states have call successors, (102), 35 states have call predecessors, (102), 65 states have return successors, (133), 100 states have call predecessors, (133), 100 states have call successors, (133) [2023-11-25 00:03:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 708 transitions. [2023-11-25 00:03:05,112 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 708 transitions. Word has length 55 [2023-11-25 00:03:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:05,112 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 708 transitions. [2023-11-25 00:03:05,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 16 states have internal predecessors, (61), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:03:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 708 transitions. [2023-11-25 00:03:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-25 00:03:05,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:05,116 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:05,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:05,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-25 00:03:05,323 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:03:05,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1914557802, now seen corresponding path program 4 times [2023-11-25 00:03:05,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:05,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556845211] [2023-11-25 00:03:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 158 proven. 255 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:03:06,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:06,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556845211] [2023-11-25 00:03:06,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556845211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:06,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545392868] [2023-11-25 00:03:06,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:03:06,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:06,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:06,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:06,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:03:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:06,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:03:06,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 158 proven. 255 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:03:06,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 158 proven. 255 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:03:07,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545392868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:07,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856367931] [2023-11-25 00:03:07,216 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-25 00:03:07,216 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:07,217 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) [2023-11-25 00:03:07,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-11-25 00:03:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090149901] [2023-11-25 00:03:07,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-25 00:03:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-25 00:03:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2023-11-25 00:03:07,222 INFO L87 Difference]: Start difference. First operand 607 states and 708 transitions. Second operand has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 28 states have internal predecessors, (109), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:03:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:10,853 INFO L93 Difference]: Finished difference Result 824 states and 972 transitions. [2023-11-25 00:03:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-11-25 00:03:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 28 states have internal predecessors, (109), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 85 [2023-11-25 00:03:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:10,861 INFO L225 Difference]: With dead ends: 824 [2023-11-25 00:03:10,862 INFO L226 Difference]: Without dead ends: 823 [2023-11-25 00:03:10,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7746 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6524, Invalid=20536, Unknown=0, NotChecked=0, Total=27060 [2023-11-25 00:03:10,874 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 844 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:10,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 159 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:03:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2023-11-25 00:03:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 823. [2023-11-25 00:03:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 595 states have (on average 1.0773109243697478) internal successors, (641), 639 states have internal predecessors, (641), 138 states have call successors, (138), 47 states have call predecessors, (138), 89 states have return successors, (181), 136 states have call predecessors, (181), 136 states have call successors, (181) [2023-11-25 00:03:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 960 transitions. [2023-11-25 00:03:10,947 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 960 transitions. Word has length 85 [2023-11-25 00:03:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:10,948 INFO L495 AbstractCegarLoop]: Abstraction has 823 states and 960 transitions. [2023-11-25 00:03:10,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 28 states have internal predecessors, (109), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-25 00:03:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 960 transitions. [2023-11-25 00:03:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-25 00:03:10,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:10,954 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1] [2023-11-25 00:03:10,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-25 00:03:11,161 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:03:11,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -226678797, now seen corresponding path program 4 times [2023-11-25 00:03:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294667196] [2023-11-25 00:03:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:12,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294667196] [2023-11-25 00:03:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294667196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410900087] [2023-11-25 00:03:12,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:03:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:12,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:12,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:03:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:12,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-25 00:03:12,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:13,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:15,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410900087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613421140] [2023-11-25 00:03:15,726 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-25 00:03:15,727 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:15,727 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) [2023-11-25 00:03:15,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-11-25 00:03:15,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879622372] [2023-11-25 00:03:15,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:15,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-25 00:03:15,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:15,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-25 00:03:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2023-11-25 00:03:15,736 INFO L87 Difference]: Start difference. First operand 823 states and 960 transitions. Second operand has 96 states, 93 states have (on average 1.989247311827957) internal successors, (185), 50 states have internal predecessors, (185), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:21,108 INFO L93 Difference]: Finished difference Result 1258 states and 1558 transitions. [2023-11-25 00:03:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-11-25 00:03:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 1.989247311827957) internal successors, (185), 50 states have internal predecessors, (185), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-11-25 00:03:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:21,119 INFO L225 Difference]: With dead ends: 1258 [2023-11-25 00:03:21,119 INFO L226 Difference]: Without dead ends: 1257 [2023-11-25 00:03:21,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8243 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10631, Invalid=23779, Unknown=0, NotChecked=0, Total=34410 [2023-11-25 00:03:21,127 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2171 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:21,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2175 Valid, 654 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:03:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2023-11-25 00:03:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1255. [2023-11-25 00:03:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 907 states have (on average 1.0771775082690187) internal successors, (977), 975 states have internal predecessors, (977), 210 states have call successors, (210), 71 states have call predecessors, (210), 137 states have return successors, (277), 208 states have call predecessors, (277), 208 states have call successors, (277) [2023-11-25 00:03:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1464 transitions. [2023-11-25 00:03:21,247 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1464 transitions. Word has length 116 [2023-11-25 00:03:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:21,248 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1464 transitions. [2023-11-25 00:03:21,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 1.989247311827957) internal successors, (185), 50 states have internal predecessors, (185), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1464 transitions. [2023-11-25 00:03:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-25 00:03:21,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:21,255 INFO L195 NwaCegarLoop]: trace histogram [27, 25, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:21,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-25 00:03:21,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-25 00:03:21,462 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:03:21,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:21,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1642547030, now seen corresponding path program 5 times [2023-11-25 00:03:21,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:21,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507107162] [2023-11-25 00:03:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:21,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 326 proven. 1221 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:03:23,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507107162] [2023-11-25 00:03:23,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507107162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921575737] [2023-11-25 00:03:23,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:03:23,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:23,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:23,061 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:23,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-25 00:03:23,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-25 00:03:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:23,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:03:23,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2023-11-25 00:03:23,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:23,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921575737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:23,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:23,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [50] total 56 [2023-11-25 00:03:23,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938360186] [2023-11-25 00:03:23,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:23,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:03:23,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:23,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:03:23,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2416, Unknown=0, NotChecked=0, Total=3080 [2023-11-25 00:03:23,287 INFO L87 Difference]: Start difference. First operand 1255 states and 1464 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:03:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:23,419 INFO L93 Difference]: Finished difference Result 1590 states and 1890 transitions. [2023-11-25 00:03:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:03:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 145 [2023-11-25 00:03:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:23,422 INFO L225 Difference]: With dead ends: 1590 [2023-11-25 00:03:23,422 INFO L226 Difference]: Without dead ends: 239 [2023-11-25 00:03:23,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=802, Invalid=2738, Unknown=0, NotChecked=0, Total=3540 [2023-11-25 00:03:23,430 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:23,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:03:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-25 00:03:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2023-11-25 00:03:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 189 states have (on average 1.0052910052910053) internal successors, (190), 189 states have internal predecessors, (190), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2023-11-25 00:03:23,449 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 145 [2023-11-25 00:03:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:23,449 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2023-11-25 00:03:23,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:03:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2023-11-25 00:03:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-11-25 00:03:23,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:23,452 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1] [2023-11-25 00:03:23,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:23,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:23,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-25 00:03:23,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1275552141, now seen corresponding path program 5 times [2023-11-25 00:03:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:23,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167878679] [2023-11-25 00:03:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:28,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167878679] [2023-11-25 00:03:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167878679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396307104] [2023-11-25 00:03:28,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:03:28,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:28,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:28,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:28,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd50c2e-9fe4-4ba7-817d-f1ef28cff1d3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-25 00:03:29,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-11-25 00:03:29,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:29,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-25 00:03:29,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:29,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:37,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396307104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:37,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780448996] [2023-11-25 00:03:37,738 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-25 00:03:37,738 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:37,739 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) [2023-11-25 00:03:37,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:03:37,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2023-11-25 00:03:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331510092] [2023-11-25 00:03:37,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-11-25 00:03:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-11-25 00:03:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2023-11-25 00:03:37,765 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 192 states, 189 states have (on average 1.9947089947089947) internal successors, (377), 98 states have internal predecessors, (377), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)