./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh --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 d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:10:12,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:10:12,411 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-12-02 18:10:12,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:10:12,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:10:12,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:10:12,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:10:12,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:10:12,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:10:12,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:10:12,443 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:10:12,443 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:10:12,444 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:10:12,444 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:10:12,445 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:10:12,445 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:10:12,446 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:10:12,446 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:10:12,446 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:10:12,447 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:10:12,447 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:10:12,449 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:10:12,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:10:12,450 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:10:12,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:10:12,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:10:12,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:10:12,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:10:12,452 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:10:12,452 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 18:10:12,452 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:10:12,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:10:12,453 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:10:12,453 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:10:12,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:10:12,454 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:10:12,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:10:12,454 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:10:12,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:10:12,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:10:12,455 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:10:12,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:10:12,455 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:10:12,455 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:10:12,455 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:10:12,456 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:10:12,456 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_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 [2023-12-02 18:10:12,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:10:12,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:10:12,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:10:12,712 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:10:12,713 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:10:12,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-numeric/rec_counter3.c [2023-12-02 18:10:15,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:10:15,531 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:10:15,532 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/sv-benchmarks/c/termination-numeric/rec_counter3.c [2023-12-02 18:10:15,539 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/data/b78f45af2/78d4426233664cb5b109ec1961c08a20/FLAG9f7d191fe [2023-12-02 18:10:15,553 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/data/b78f45af2/78d4426233664cb5b109ec1961c08a20 [2023-12-02 18:10:15,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:10:15,557 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:10:15,558 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:10:15,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:10:15,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:10:15,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63bd6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15, skipping insertion in model container [2023-12-02 18:10:15,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,584 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:10:15,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:10:15,740 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:10:15,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:10:15,768 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:10:15,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15 WrapperNode [2023-12-02 18:10:15,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:10:15,770 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:10:15,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:10:15,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:10:15,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,797 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 17 [2023-12-02 18:10:15,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:10:15,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:10:15,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:10:15,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:10:15,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,817 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:10:15,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:10:15,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:10:15,818 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:10:15,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (1/1) ... [2023-12-02 18:10:15,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:10:15,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:15,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:10:15,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:10:15,881 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2023-12-02 18:10:15,881 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2023-12-02 18:10:15,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:10:15,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:10:15,933 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:10:15,935 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:10:16,043 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:10:16,060 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:10:16,060 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 18:10:16,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:10:16 BoogieIcfgContainer [2023-12-02 18:10:16,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:10:16,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:10:16,065 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:10:16,068 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:10:16,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:10:15" (1/3) ... [2023-12-02 18:10:16,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a62e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:10:16, skipping insertion in model container [2023-12-02 18:10:16,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:10:15" (2/3) ... [2023-12-02 18:10:16,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a62e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:10:16, skipping insertion in model container [2023-12-02 18:10:16,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:10:16" (3/3) ... [2023-12-02 18:10:16,071 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_counter3.c [2023-12-02 18:10:16,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:10:16,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 18:10:16,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:10:16,149 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;@68b0884e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:10:16,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-02 18:10:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:10:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 18:10:16,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:16,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 18:10:16,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:16,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:16,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1651969229, now seen corresponding path program 1 times [2023-12-02 18:10:16,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:16,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535765950] [2023-12-02 18:10:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:16,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:10:16,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535765950] [2023-12-02 18:10:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535765950] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:16,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:16,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:10:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313773598] [2023-12-02 18:10:16,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:16,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:10:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:10:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:10:16,369 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:10:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:16,471 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-12-02 18:10:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:10:16,473 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 [2023-12-02 18:10:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:16,481 INFO L225 Difference]: With dead ends: 52 [2023-12-02 18:10:16,495 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 18:10:16,505 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 [2023-12-02 18:10:16,509 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:16,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 76 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:10:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 18:10:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-12-02 18:10:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.565217391304348) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:10:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-12-02 18:10:16,552 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 6 [2023-12-02 18:10:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:16,553 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-12-02 18:10:16,553 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) [2023-12-02 18:10:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-12-02 18:10:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:10:16,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:16,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:16,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:10:16,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:16,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:16,556 INFO L85 PathProgramCache]: Analyzing trace with hash 328561491, now seen corresponding path program 1 times [2023-12-02 18:10:16,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:16,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944996838] [2023-12-02 18:10:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:16,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:10:16,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:16,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944996838] [2023-12-02 18:10:16,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944996838] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:16,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:16,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:10:16,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453891960] [2023-12-02 18:10:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:16,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:10:16,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:10:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:10:16,619 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:10:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:16,660 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-12-02 18:10:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:10:16,661 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 [2023-12-02 18:10:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:16,662 INFO L225 Difference]: With dead ends: 33 [2023-12-02 18:10:16,662 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 18:10:16,663 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 [2023-12-02 18:10:16,665 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:16,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 18:10:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-02 18:10:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:10:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-12-02 18:10:16,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2023-12-02 18:10:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:16,675 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-12-02 18:10:16,676 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) [2023-12-02 18:10:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-12-02 18:10:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 18:10:16,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:16,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:16,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:10:16,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:16,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1705173347, now seen corresponding path program 1 times [2023-12-02 18:10:16,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:16,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123281948] [2023-12-02 18:10:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:16,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:10:16,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:16,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123281948] [2023-12-02 18:10:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123281948] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:16,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567639394] [2023-12-02 18:10:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:16,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:16,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:16,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:16,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:10:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:16,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:10:16,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:10:16,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:10:16,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567639394] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:16,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [786660162] [2023-12-02 18:10:16,969 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 18:10:16,969 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:16,974 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) [2023-12-02 18:10:16,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:16,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-12-02 18:10:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741674254] [2023-12-02 18:10:16,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:10:16,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:16,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:10:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:10:16,978 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:10:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:17,060 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-12-02 18:10:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:10:17,061 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 [2023-12-02 18:10:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:17,063 INFO L225 Difference]: With dead ends: 38 [2023-12-02 18:10:17,064 INFO L226 Difference]: Without dead ends: 37 [2023-12-02 18:10:17,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:10:17,066 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:17,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 65 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-02 18:10:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-12-02 18:10:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.434782608695652) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:10:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-12-02 18:10:17,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2023-12-02 18:10:17,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:17,077 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-12-02 18:10:17,077 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) [2023-12-02 18:10:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-12-02 18:10:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 18:10:17,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:17,079 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:17,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:10:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:17,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:17,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash -753523798, now seen corresponding path program 1 times [2023-12-02 18:10:17,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:17,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229150597] [2023-12-02 18:10:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:10:17,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229150597] [2023-12-02 18:10:17,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229150597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:17,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:17,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:10:17,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382194436] [2023-12-02 18:10:17,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:17,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:10:17,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:17,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:10:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:10:17,325 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:10:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:17,337 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-12-02 18:10:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:10:17,338 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 [2023-12-02 18:10:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:17,339 INFO L225 Difference]: With dead ends: 31 [2023-12-02 18:10:17,339 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 18:10:17,340 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 [2023-12-02 18:10:17,341 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:17,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 18:10:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-02 18:10:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:10:17,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-12-02 18:10:17,348 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2023-12-02 18:10:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:17,349 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-12-02 18:10:17,349 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) [2023-12-02 18:10:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-12-02 18:10:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 18:10:17,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:17,350 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:17,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:10:17,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:17,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash -753522458, now seen corresponding path program 1 times [2023-12-02 18:10:17,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384896097] [2023-12-02 18:10:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:10:17,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:17,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384896097] [2023-12-02 18:10:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384896097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:17,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:17,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:10:17,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212262160] [2023-12-02 18:10:17,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:17,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:10:17,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:17,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:10:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:10:17,395 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:10:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:17,406 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-12-02 18:10:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:10:17,406 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 [2023-12-02 18:10:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:17,407 INFO L225 Difference]: With dead ends: 32 [2023-12-02 18:10:17,407 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 18:10:17,408 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 [2023-12-02 18:10:17,409 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:17,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 18:10:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-02 18:10:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:10:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-12-02 18:10:17,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2023-12-02 18:10:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:17,418 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-12-02 18:10:17,418 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) [2023-12-02 18:10:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-12-02 18:10:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 18:10:17,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:17,420 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:17,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:10:17,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:17,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1884401205, now seen corresponding path program 1 times [2023-12-02 18:10:17,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:17,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280725980] [2023-12-02 18:10:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:10:17,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280725980] [2023-12-02 18:10:17,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280725980] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:17,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:17,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:10:17,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469104285] [2023-12-02 18:10:17,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:17,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:10:17,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:17,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:10:17,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:10:17,490 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:10:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:17,514 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-12-02 18:10:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:10:17,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-02 18:10:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:17,515 INFO L225 Difference]: With dead ends: 51 [2023-12-02 18:10:17,516 INFO L226 Difference]: Without dead ends: 35 [2023-12-02 18:10:17,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:10:17,517 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:17,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-02 18:10:17,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-02 18:10:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:10:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-12-02 18:10:17,527 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2023-12-02 18:10:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:17,527 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-12-02 18:10:17,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:10:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-12-02 18:10:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 18:10:17,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:17,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:17,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:10:17,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:17,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1884359658, now seen corresponding path program 1 times [2023-12-02 18:10:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:17,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434973365] [2023-12-02 18:10:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:10:17,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:17,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434973365] [2023-12-02 18:10:17,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434973365] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:17,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:17,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:10:17,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29163678] [2023-12-02 18:10:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:10:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:10:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:17,573 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:10:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:17,604 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-12-02 18:10:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:10:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-02 18:10:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:17,606 INFO L225 Difference]: With dead ends: 49 [2023-12-02 18:10:17,606 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 18:10:17,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:10:17,607 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:17,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 18:10:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-12-02 18:10:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:10:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-12-02 18:10:17,618 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 16 [2023-12-02 18:10:17,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:17,619 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-12-02 18:10:17,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:10:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-12-02 18:10:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:10:17,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:17,620 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 18:10:17,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:17,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1042699547, now seen corresponding path program 1 times [2023-12-02 18:10:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:17,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139910957] [2023-12-02 18:10:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:10:17,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:17,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139910957] [2023-12-02 18:10:17,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139910957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:17,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733013788] [2023-12-02 18:10:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:17,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:17,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:17,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:10:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:17,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:10:17,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:10:17,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:10:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733013788] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:10:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2023-12-02 18:10:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834281063] [2023-12-02 18:10:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:10:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:10:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:10:17,847 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:10:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:17,887 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-12-02 18:10:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:10:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-02 18:10:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:17,889 INFO L225 Difference]: With dead ends: 37 [2023-12-02 18:10:17,889 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 18:10:17,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:10:17,890 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:17,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 18:10:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-02 18:10:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:10:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-12-02 18:10:17,898 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 27 [2023-12-02 18:10:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:17,899 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-12-02 18:10:17,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:10:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-12-02 18:10:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 18:10:17,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:17,900 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:17,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:10:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 18:10:18,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:18,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1858629735, now seen corresponding path program 1 times [2023-12-02 18:10:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174797655] [2023-12-02 18:10:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:10:18,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174797655] [2023-12-02 18:10:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174797655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407956963] [2023-12-02 18:10:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:18,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:18,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:18,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:18,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:10:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:18,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:10:18,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:10:18,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:10:18,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407956963] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:18,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1226738042] [2023-12-02 18:10:18,462 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:18,462 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:18,463 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) [2023-12-02 18:10:18,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:18,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-12-02 18:10:18,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874550243] [2023-12-02 18:10:18,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:18,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 18:10:18,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 18:10:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:10:18,465 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:10:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:18,581 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2023-12-02 18:10:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 18:10:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-12-02 18:10:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:18,583 INFO L225 Difference]: With dead ends: 95 [2023-12-02 18:10:18,583 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 18:10:18,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:10:18,585 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:18,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 95 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:10:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 18:10:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2023-12-02 18:10:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 18:10:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-12-02 18:10:18,597 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 30 [2023-12-02 18:10:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:18,598 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-12-02 18:10:18,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:10:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-12-02 18:10:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:10:18,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:18,601 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 18:10:18,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:10:18,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:18,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:18,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash -956172906, now seen corresponding path program 2 times [2023-12-02 18:10:18,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:18,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869505544] [2023-12-02 18:10:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:18,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-02 18:10:18,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:18,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869505544] [2023-12-02 18:10:18,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869505544] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:18,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483473239] [2023-12-02 18:10:18,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:10:18,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:18,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:18,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:18,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:10:18,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 18:10:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:10:18,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:10:18,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-02 18:10:19,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-02 18:10:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483473239] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:19,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674631711] [2023-12-02 18:10:19,111 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:19,111 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:19,112 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) [2023-12-02 18:10:19,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:19,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-12-02 18:10:19,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823216717] [2023-12-02 18:10:19,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:19,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:10:19,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:10:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:10:19,114 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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) [2023-12-02 18:10:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:19,206 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2023-12-02 18:10:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:10:19,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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 76 [2023-12-02 18:10:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:19,208 INFO L225 Difference]: With dead ends: 128 [2023-12-02 18:10:19,208 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 18:10:19,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:10:19,210 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:19,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 55 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 18:10:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2023-12-02 18:10:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 18:10:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2023-12-02 18:10:19,225 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 76 [2023-12-02 18:10:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:19,226 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2023-12-02 18:10:19,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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) [2023-12-02 18:10:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2023-12-02 18:10:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 18:10:19,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:19,228 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-12-02 18:10:19,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:10:19,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:19,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:19,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2075724342, now seen corresponding path program 3 times [2023-12-02 18:10:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:19,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016745098] [2023-12-02 18:10:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:19,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 18:10:19,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:19,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016745098] [2023-12-02 18:10:19,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016745098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:19,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:19,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 18:10:19,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235013748] [2023-12-02 18:10:19,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:19,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:10:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:10:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:10:19,627 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:10:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:19,695 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2023-12-02 18:10:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:10:19,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2023-12-02 18:10:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:19,697 INFO L225 Difference]: With dead ends: 143 [2023-12-02 18:10:19,697 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 18:10:19,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:10:19,699 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:19,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 95 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 18:10:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2023-12-02 18:10:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 7 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:10:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-12-02 18:10:19,718 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 72 [2023-12-02 18:10:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:19,719 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-12-02 18:10:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:10:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-12-02 18:10:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 18:10:19,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:19,721 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-12-02 18:10:19,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 18:10:19,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:19,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash -526074122, now seen corresponding path program 4 times [2023-12-02 18:10:19,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:19,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860439012] [2023-12-02 18:10:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 94 proven. 4 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-02 18:10:19,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860439012] [2023-12-02 18:10:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860439012] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278692933] [2023-12-02 18:10:19,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:10:19,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:19,923 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:19,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:10:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:19,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:10:19,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 89 proven. 9 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-02 18:10:20,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 89 proven. 9 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-02 18:10:20,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278692933] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776583353] [2023-12-02 18:10:20,534 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:20,534 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:20,534 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) [2023-12-02 18:10:20,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:20,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-12-02 18:10:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292748354] [2023-12-02 18:10:20,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:20,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 18:10:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 18:10:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:10:20,537 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:10:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:20,626 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2023-12-02 18:10:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:10:20,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 88 [2023-12-02 18:10:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:20,627 INFO L225 Difference]: With dead ends: 139 [2023-12-02 18:10:20,627 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 18:10:20,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:10:20,629 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:20,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:10:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 18:10:20,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 18:10:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 18:10:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2023-12-02 18:10:20,642 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 88 [2023-12-02 18:10:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:20,642 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2023-12-02 18:10:20,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:10:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2023-12-02 18:10:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 18:10:20,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:20,644 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-12-02 18:10:20,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:10:20,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:20,847 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:20,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1510077450, now seen corresponding path program 5 times [2023-12-02 18:10:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:20,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421486103] [2023-12-02 18:10:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:20,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 141 proven. 25 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-02 18:10:21,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421486103] [2023-12-02 18:10:21,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421486103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593072405] [2023-12-02 18:10:21,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:10:21,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:21,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:21,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:21,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:10:21,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 18:10:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:10:21,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:10:21,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 74 proven. 12 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-12-02 18:10:21,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 74 proven. 12 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-12-02 18:10:21,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593072405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957176558] [2023-12-02 18:10:21,615 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:21,615 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:21,615 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 18:10:21,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:21,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 35 [2023-12-02 18:10:21,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887534276] [2023-12-02 18:10:21,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:21,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 18:10:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 18:10:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 18:10:21,619 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 18:10:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:22,686 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2023-12-02 18:10:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-02 18:10:22,686 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 84 [2023-12-02 18:10:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:22,688 INFO L225 Difference]: With dead ends: 222 [2023-12-02 18:10:22,688 INFO L226 Difference]: Without dead ends: 187 [2023-12-02 18:10:22,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1307, Invalid=5499, Unknown=0, NotChecked=0, Total=6806 [2023-12-02 18:10:22,693 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:22,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 223 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:10:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-12-02 18:10:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 108. [2023-12-02 18:10:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 18:10:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2023-12-02 18:10:22,709 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 84 [2023-12-02 18:10:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:22,709 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2023-12-02 18:10:22,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 18:10:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2023-12-02 18:10:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 18:10:22,711 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:22,711 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-12-02 18:10:22,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:10:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:22,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:22,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash -445507725, now seen corresponding path program 6 times [2023-12-02 18:10:22,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310389281] [2023-12-02 18:10:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-12-02 18:10:23,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:23,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310389281] [2023-12-02 18:10:23,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310389281] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:23,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869124151] [2023-12-02 18:10:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:10:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:23,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:23,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:10:23,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:10:23,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:10:23,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:10:23,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-12-02 18:10:23,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-12-02 18:10:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869124151] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:24,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703498807] [2023-12-02 18:10:24,384 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:24,384 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:24,385 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) [2023-12-02 18:10:24,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-12-02 18:10:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529562912] [2023-12-02 18:10:24,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 18:10:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 18:10:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2023-12-02 18:10:24,388 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 22 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 18:10:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:24,604 INFO L93 Difference]: Finished difference Result 435 states and 493 transitions. [2023-12-02 18:10:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 18:10:24,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 22 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 109 [2023-12-02 18:10:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:24,607 INFO L225 Difference]: With dead ends: 435 [2023-12-02 18:10:24,607 INFO L226 Difference]: Without dead ends: 284 [2023-12-02 18:10:24,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=1291, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 18:10:24,609 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:24,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 143 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:10:24,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-12-02 18:10:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 198. [2023-12-02 18:10:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 183 states have (on average 1.092896174863388) internal successors, (200), 183 states have internal predecessors, (200), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 18:10:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 215 transitions. [2023-12-02 18:10:24,627 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 215 transitions. Word has length 109 [2023-12-02 18:10:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:24,627 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 215 transitions. [2023-12-02 18:10:24,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 22 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 18:10:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 215 transitions. [2023-12-02 18:10:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-12-02 18:10:24,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:24,629 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-12-02 18:10:24,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 18:10:24,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 18:10:24,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:24,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1689533907, now seen corresponding path program 7 times [2023-12-02 18:10:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133112589] [2023-12-02 18:10:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1148 proven. 51 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2023-12-02 18:10:25,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133112589] [2023-12-02 18:10:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133112589] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105016105] [2023-12-02 18:10:25,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:10:25,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:25,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:25,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:25,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:10:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:25,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:10:25,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1033 proven. 88 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2023-12-02 18:10:25,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1033 proven. 88 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2023-12-02 18:10:28,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105016105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121186534] [2023-12-02 18:10:28,230 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:28,230 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:28,230 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) [2023-12-02 18:10:28,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:28,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 30 [2023-12-02 18:10:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612761496] [2023-12-02 18:10:28,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 18:10:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 18:10:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-12-02 18:10:28,233 INFO L87 Difference]: Start difference. First operand 198 states and 215 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 25 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:10:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:28,775 INFO L93 Difference]: Finished difference Result 426 states and 469 transitions. [2023-12-02 18:10:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 18:10:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 25 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 219 [2023-12-02 18:10:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:28,777 INFO L225 Difference]: With dead ends: 426 [2023-12-02 18:10:28,777 INFO L226 Difference]: Without dead ends: 266 [2023-12-02 18:10:28,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 405 SyntacticMatches, 21 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=2542, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 18:10:28,780 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:28,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 294 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:10:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-02 18:10:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 253. [2023-12-02 18:10:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 235 states have (on average 1.0808510638297872) internal successors, (254), 235 states have internal predecessors, (254), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 15 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:10:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 272 transitions. [2023-12-02 18:10:28,812 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 272 transitions. Word has length 219 [2023-12-02 18:10:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:28,812 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 272 transitions. [2023-12-02 18:10:28,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 25 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:10:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 272 transitions. [2023-12-02 18:10:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-12-02 18:10:28,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:28,816 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 37, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-12-02 18:10:28,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:10:29,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 18:10:29,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:29,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash -447652269, now seen corresponding path program 8 times [2023-12-02 18:10:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:29,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397362469] [2023-12-02 18:10:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 1512 proven. 90 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2023-12-02 18:10:29,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397362469] [2023-12-02 18:10:29,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397362469] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590534598] [2023-12-02 18:10:29,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:10:29,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:29,520 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:29,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:10:29,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 18:10:29,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:10:29,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:10:29,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 1093 proven. 120 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2023-12-02 18:10:29,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 1093 proven. 120 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2023-12-02 18:10:30,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590534598] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:30,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323505458] [2023-12-02 18:10:30,448 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:30,448 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:30,448 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) [2023-12-02 18:10:30,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:30,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2023-12-02 18:10:30,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002987584] [2023-12-02 18:10:30,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:30,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-02 18:10:30,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-02 18:10:30,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 18:10:30,453 INFO L87 Difference]: Start difference. First operand 253 states and 272 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 44 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:10:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:32,334 INFO L93 Difference]: Finished difference Result 1061 states and 1206 transitions. [2023-12-02 18:10:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-02 18:10:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 44 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 237 [2023-12-02 18:10:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:32,338 INFO L225 Difference]: With dead ends: 1061 [2023-12-02 18:10:32,338 INFO L226 Difference]: Without dead ends: 847 [2023-12-02 18:10:32,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3695 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2102, Invalid=12178, Unknown=0, NotChecked=0, Total=14280 [2023-12-02 18:10:32,344 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 455 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:32,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 360 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:10:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-12-02 18:10:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 339. [2023-12-02 18:10:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 318 states have (on average 1.0849056603773586) internal successors, (345), 318 states have internal predecessors, (345), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 18 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 18:10:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 366 transitions. [2023-12-02 18:10:32,400 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 366 transitions. Word has length 237 [2023-12-02 18:10:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:32,401 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 366 transitions. [2023-12-02 18:10:32,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 44 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:10:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 366 transitions. [2023-12-02 18:10:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-12-02 18:10:32,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:32,407 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 14, 13, 13, 13, 13, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-12-02 18:10:32,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:10:32,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 18:10:32,611 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:32,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1423560362, now seen corresponding path program 9 times [2023-12-02 18:10:32,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:32,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576951404] [2023-12-02 18:10:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:32,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 2742 proven. 138 refuted. 0 times theorem prover too weak. 1778 trivial. 0 not checked. [2023-12-02 18:10:33,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:33,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576951404] [2023-12-02 18:10:33,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576951404] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:33,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927839495] [2023-12-02 18:10:33,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:10:33,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:33,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:33,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:10:33,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:10:33,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:10:33,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 18:10:33,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 2566 proven. 311 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2023-12-02 18:10:33,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 2566 proven. 311 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2023-12-02 18:10:38,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927839495] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:38,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126256742] [2023-12-02 18:10:38,425 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:38,425 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:38,425 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) [2023-12-02 18:10:38,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:38,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 33] total 44 [2023-12-02 18:10:38,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321487271] [2023-12-02 18:10:38,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:38,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 18:10:38,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 18:10:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 18:10:38,429 INFO L87 Difference]: Start difference. First operand 339 states and 366 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 37 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 18:10:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:39,510 INFO L93 Difference]: Finished difference Result 700 states and 756 transitions. [2023-12-02 18:10:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 18:10:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 37 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) Word has length 280 [2023-12-02 18:10:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:39,513 INFO L225 Difference]: With dead ends: 700 [2023-12-02 18:10:39,513 INFO L226 Difference]: Without dead ends: 474 [2023-12-02 18:10:39,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 511 SyntacticMatches, 31 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3658 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1171, Invalid=7759, Unknown=0, NotChecked=0, Total=8930 [2023-12-02 18:10:39,517 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:39,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 372 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:10:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-12-02 18:10:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 422. [2023-12-02 18:10:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 397 states have (on average 1.0730478589420656) internal successors, (426), 397 states have internal predecessors, (426), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 18:10:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 451 transitions. [2023-12-02 18:10:39,580 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 451 transitions. Word has length 280 [2023-12-02 18:10:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:39,580 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 451 transitions. [2023-12-02 18:10:39,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 37 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 18:10:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 451 transitions. [2023-12-02 18:10:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-12-02 18:10:39,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:39,585 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 14, 13, 13, 13, 13, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-12-02 18:10:39,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:10:39,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 18:10:39,785 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:39,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2053963379, now seen corresponding path program 10 times [2023-12-02 18:10:39,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:39,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797522294] [2023-12-02 18:10:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:39,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 3092 proven. 195 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2023-12-02 18:10:40,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:40,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797522294] [2023-12-02 18:10:40,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797522294] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:40,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675927408] [2023-12-02 18:10:40,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:10:40,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:40,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:40,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:10:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:40,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 18:10:40,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 3167 proven. 499 refuted. 0 times theorem prover too weak. 1466 trivial. 0 not checked. [2023-12-02 18:10:41,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 3167 proven. 499 refuted. 0 times theorem prover too weak. 1466 trivial. 0 not checked. [2023-12-02 18:10:47,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675927408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:47,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1164610227] [2023-12-02 18:10:47,078 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:47,078 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:47,078 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) [2023-12-02 18:10:47,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:47,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38, 38] total 51 [2023-12-02 18:10:47,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453526039] [2023-12-02 18:10:47,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:47,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 18:10:47,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 18:10:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 18:10:47,081 INFO L87 Difference]: Start difference. First operand 422 states and 451 transitions. Second operand has 51 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 43 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 18:10:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:48,866 INFO L93 Difference]: Finished difference Result 859 states and 916 transitions. [2023-12-02 18:10:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-02 18:10:48,866 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 43 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 289 [2023-12-02 18:10:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:48,870 INFO L225 Difference]: With dead ends: 859 [2023-12-02 18:10:48,870 INFO L226 Difference]: Without dead ends: 615 [2023-12-02 18:10:48,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 521 SyntacticMatches, 36 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5648 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1769, Invalid=12037, Unknown=0, NotChecked=0, Total=13806 [2023-12-02 18:10:48,878 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:48,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 440 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:10:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-12-02 18:10:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 535. [2023-12-02 18:10:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 505 states have (on average 1.0633663366336634) internal successors, (537), 505 states have internal predecessors, (537), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:10:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 567 transitions. [2023-12-02 18:10:48,945 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 567 transitions. Word has length 289 [2023-12-02 18:10:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:48,945 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 567 transitions. [2023-12-02 18:10:48,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 43 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 18:10:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 567 transitions. [2023-12-02 18:10:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-12-02 18:10:48,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:48,948 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 53, 14, 13, 13, 13, 13, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-12-02 18:10:48,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:10:49,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 18:10:49,148 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:10:49,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1876467725, now seen corresponding path program 11 times [2023-12-02 18:10:49,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:49,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789072341] [2023-12-02 18:10:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5463 backedges. 3596 proven. 750 refuted. 0 times theorem prover too weak. 1117 trivial. 0 not checked. [2023-12-02 18:10:50,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789072341] [2023-12-02 18:10:50,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789072341] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:10:50,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783056383] [2023-12-02 18:10:50,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:10:50,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:10:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:10:50,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:10:50,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:10:50,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-02 18:10:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:10:50,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 18:10:50,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:10:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5463 backedges. 1352 proven. 117 refuted. 0 times theorem prover too weak. 3994 trivial. 0 not checked. [2023-12-02 18:10:51,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:10:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5463 backedges. 1352 proven. 117 refuted. 0 times theorem prover too weak. 3994 trivial. 0 not checked. [2023-12-02 18:10:52,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783056383] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:10:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247021238] [2023-12-02 18:10:52,012 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:10:52,012 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:10:52,013 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) [2023-12-02 18:10:52,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:10:52,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 21, 21] total 83 [2023-12-02 18:10:52,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136701553] [2023-12-02 18:10:52,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:10:52,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-02 18:10:52,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-02 18:10:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=6048, Unknown=0, NotChecked=0, Total=6806 [2023-12-02 18:10:52,017 INFO L87 Difference]: Start difference. First operand 535 states and 567 transitions. Second operand has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 74 states have internal predecessors, (172), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2023-12-02 18:11:02,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:02,948 INFO L93 Difference]: Finished difference Result 1257 states and 1432 transitions. [2023-12-02 18:11:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2023-12-02 18:11:02,948 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 74 states have internal predecessors, (172), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 295 [2023-12-02 18:11:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:02,954 INFO L225 Difference]: With dead ends: 1257 [2023-12-02 18:11:02,955 INFO L226 Difference]: Without dead ends: 1153 [2023-12-02 18:11:02,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 463 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86952 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=35153, Invalid=180607, Unknown=0, NotChecked=0, Total=215760 [2023-12-02 18:11:02,970 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 477 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:02,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 509 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2014 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 18:11:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2023-12-02 18:11:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 598. [2023-12-02 18:11:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 568 states have (on average 1.0704225352112675) internal successors, (608), 568 states have internal predecessors, (608), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:11:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 638 transitions. [2023-12-02 18:11:03,072 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 638 transitions. Word has length 295 [2023-12-02 18:11:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:03,072 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 638 transitions. [2023-12-02 18:11:03,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 74 states have internal predecessors, (172), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2023-12-02 18:11:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 638 transitions. [2023-12-02 18:11:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-12-02 18:11:03,077 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:03,077 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2023-12-02 18:11:03,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 18:11:03,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:03,278 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:11:03,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash -653912554, now seen corresponding path program 12 times [2023-12-02 18:11:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:03,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809507602] [2023-12-02 18:11:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7379 backedges. 0 proven. 6154 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-12-02 18:11:04,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:04,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809507602] [2023-12-02 18:11:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809507602] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:11:04,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437121196] [2023-12-02 18:11:04,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:11:04,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:04,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:11:04,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:11:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 18:11:04,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:11:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:11:04,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 18:11:04,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:11:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7379 backedges. 2830 proven. 532 refuted. 0 times theorem prover too weak. 4017 trivial. 0 not checked. [2023-12-02 18:11:05,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:11:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7379 backedges. 2830 proven. 532 refuted. 0 times theorem prover too weak. 4017 trivial. 0 not checked. [2023-12-02 18:11:07,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437121196] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:11:07,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439653325] [2023-12-02 18:11:07,837 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:11:07,837 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:11:07,838 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) [2023-12-02 18:11:07,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:11:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 41, 41] total 115 [2023-12-02 18:11:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744301714] [2023-12-02 18:11:07,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:11:07,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-12-02 18:11:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:11:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-12-02 18:11:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2470, Invalid=10870, Unknown=0, NotChecked=0, Total=13340 [2023-12-02 18:11:07,843 INFO L87 Difference]: Start difference. First operand 598 states and 638 transitions. Second operand has 116 states, 115 states have (on average 1.9478260869565218) internal successors, (224), 105 states have internal predecessors, (224), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 18:11:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:15,317 INFO L93 Difference]: Finished difference Result 939 states and 1045 transitions. [2023-12-02 18:11:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2023-12-02 18:11:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.9478260869565218) internal successors, (224), 105 states have internal predecessors, (224), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) Word has length 318 [2023-12-02 18:11:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:15,323 INFO L225 Difference]: With dead ends: 939 [2023-12-02 18:11:15,323 INFO L226 Difference]: Without dead ends: 873 [2023-12-02 18:11:15,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25332 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=24281, Invalid=61861, Unknown=0, NotChecked=0, Total=86142 [2023-12-02 18:11:15,330 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1122 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:15,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 214 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:11:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-12-02 18:11:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 754. [2023-12-02 18:11:15,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 723 states have (on average 1.0871369294605808) internal successors, (786), 723 states have internal predecessors, (786), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-02 18:11:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 817 transitions. [2023-12-02 18:11:15,446 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 817 transitions. Word has length 318 [2023-12-02 18:11:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:15,446 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 817 transitions. [2023-12-02 18:11:15,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.9478260869565218) internal successors, (224), 105 states have internal predecessors, (224), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2023-12-02 18:11:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 817 transitions. [2023-12-02 18:11:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2023-12-02 18:11:15,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:15,453 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1] [2023-12-02 18:11:15,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 18:11:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:15,655 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:11:15,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1287026512, now seen corresponding path program 13 times [2023-12-02 18:11:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:15,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509040177] [2023-12-02 18:11:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:15,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14991 backedges. 0 proven. 11828 refuted. 0 times theorem prover too weak. 3163 trivial. 0 not checked. [2023-12-02 18:11:17,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509040177] [2023-12-02 18:11:17,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509040177] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:11:17,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948550698] [2023-12-02 18:11:17,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:11:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:11:17,119 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:11:17,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 18:11:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:17,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 18:11:17,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:11:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14991 backedges. 0 proven. 11825 refuted. 0 times theorem prover too weak. 3166 trivial. 0 not checked. [2023-12-02 18:11:17,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:11:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14991 backedges. 0 proven. 11825 refuted. 0 times theorem prover too weak. 3166 trivial. 0 not checked. [2023-12-02 18:11:28,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948550698] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:11:28,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192990634] [2023-12-02 18:11:28,359 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:11:28,359 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:11:28,360 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) [2023-12-02 18:11:28,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:11:28,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2023-12-02 18:11:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340154305] [2023-12-02 18:11:28,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:11:28,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-02 18:11:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:11:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-02 18:11:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=4554, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 18:11:28,364 INFO L87 Difference]: Start difference. First operand 754 states and 817 transitions. Second operand has 75 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 51 states have internal predecessors, (196), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2023-12-02 18:11:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:29,475 INFO L93 Difference]: Finished difference Result 4964 states and 5553 transitions. [2023-12-02 18:11:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-12-02 18:11:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 51 states have internal predecessors, (196), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) Word has length 419 [2023-12-02 18:11:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:29,488 INFO L225 Difference]: With dead ends: 4964 [2023-12-02 18:11:29,488 INFO L226 Difference]: Without dead ends: 3390 [2023-12-02 18:11:29,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1955, Invalid=8145, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 18:11:29,512 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:29,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 335 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:11:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2023-12-02 18:11:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 1144. [2023-12-02 18:11:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1100 states have (on average 1.069090909090909) internal successors, (1176), 1100 states have internal predecessors, (1176), 3 states have call successors, (3), 2 states have call predecessors, (3), 40 states have return successors, (41), 41 states have call predecessors, (41), 2 states have call successors, (41) [2023-12-02 18:11:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1220 transitions. [2023-12-02 18:11:29,801 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1220 transitions. Word has length 419 [2023-12-02 18:11:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:29,802 INFO L495 AbstractCegarLoop]: Abstraction has 1144 states and 1220 transitions. [2023-12-02 18:11:29,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 51 states have internal predecessors, (196), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2023-12-02 18:11:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1220 transitions. [2023-12-02 18:11:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 875 [2023-12-02 18:11:29,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:29,814 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 198, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:11:29,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 18:11:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:30,015 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:11:30,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1268326794, now seen corresponding path program 14 times [2023-12-02 18:11:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:30,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033791066] [2023-12-02 18:11:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 66809 backedges. 33208 proven. 336 refuted. 0 times theorem prover too weak. 33265 trivial. 0 not checked. [2023-12-02 18:11:32,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033791066] [2023-12-02 18:11:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033791066] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:11:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322180027] [2023-12-02 18:11:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:11:32,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:11:32,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:11:32,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 18:11:32,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 18:11:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:11:32,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 18:11:32,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:11:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 66809 backedges. 28500 proven. 4202 refuted. 0 times theorem prover too weak. 34107 trivial. 0 not checked. [2023-12-02 18:11:33,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:11:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 66809 backedges. 28500 proven. 4202 refuted. 0 times theorem prover too weak. 34107 trivial. 0 not checked. [2023-12-02 18:11:36,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322180027] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:11:36,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207338204] [2023-12-02 18:11:36,849 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:11:36,849 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:11:36,849 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) [2023-12-02 18:11:36,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:11:36,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 28, 28] total 91 [2023-12-02 18:11:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639724188] [2023-12-02 18:11:36,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:11:36,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-02 18:11:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:11:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-02 18:11:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=7359, Unknown=0, NotChecked=0, Total=8190 [2023-12-02 18:11:36,855 INFO L87 Difference]: Start difference. First operand 1144 states and 1220 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 84 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 18:11:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:47,255 INFO L93 Difference]: Finished difference Result 7618 states and 8672 transitions. [2023-12-02 18:11:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2023-12-02 18:11:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 84 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) Word has length 874 [2023-12-02 18:11:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:47,277 INFO L225 Difference]: With dead ends: 7618 [2023-12-02 18:11:47,277 INFO L226 Difference]: Without dead ends: 6384 [2023-12-02 18:11:47,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2031 GetRequests, 1695 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38525 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=13033, Invalid=100873, Unknown=0, NotChecked=0, Total=113906 [2023-12-02 18:11:47,290 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1661 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:47,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1661 Valid, 699 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:11:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2023-12-02 18:11:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 1559. [2023-12-02 18:11:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1508 states have (on average 1.0722811671087533) internal successors, (1617), 1508 states have internal predecessors, (1617), 3 states have call successors, (3), 2 states have call predecessors, (3), 47 states have return successors, (48), 48 states have call predecessors, (48), 2 states have call successors, (48) [2023-12-02 18:11:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 1668 transitions. [2023-12-02 18:11:47,690 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 1668 transitions. Word has length 874 [2023-12-02 18:11:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:47,691 INFO L495 AbstractCegarLoop]: Abstraction has 1559 states and 1668 transitions. [2023-12-02 18:11:47,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 84 states have internal predecessors, (183), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 18:11:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 1668 transitions. [2023-12-02 18:11:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2023-12-02 18:11:47,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:47,701 INFO L195 NwaCegarLoop]: trace histogram [234, 234, 234, 28, 27, 27, 27, 27, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:11:47,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 18:11:47,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 18:11:47,902 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:11:47,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1351560522, now seen corresponding path program 15 times [2023-12-02 18:11:47,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609642496] [2023-12-02 18:11:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 91242 backedges. 49492 proven. 420 refuted. 0 times theorem prover too weak. 41330 trivial. 0 not checked. [2023-12-02 18:11:50,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:50,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609642496] [2023-12-02 18:11:50,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609642496] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:11:50,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019331226] [2023-12-02 18:11:50,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:11:50,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:50,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:11:50,962 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:11:50,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 18:11:51,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:11:51,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:11:51,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 2244 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 18:11:51,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:11:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 91242 backedges. 36127 proven. 1477 refuted. 0 times theorem prover too weak. 53638 trivial. 0 not checked. [2023-12-02 18:11:52,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:12:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 91242 backedges. 36127 proven. 1477 refuted. 0 times theorem prover too weak. 53638 trivial. 0 not checked. [2023-12-02 18:12:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019331226] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:12:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [509812154] [2023-12-02 18:12:27,548 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:12:27,548 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:12:27,548 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) [2023-12-02 18:12:27,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:12:27,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 53, 53] total 72 [2023-12-02 18:12:27,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891362491] [2023-12-02 18:12:27,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:12:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-12-02 18:12:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:12:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-12-02 18:12:27,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4645, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 18:12:27,553 INFO L87 Difference]: Start difference. First operand 1559 states and 1668 transitions. Second operand has 72 states, 72 states have (on average 2.25) internal successors, (162), 61 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2023-12-02 18:12:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:12:31,603 INFO L93 Difference]: Finished difference Result 3216 states and 3441 transitions. [2023-12-02 18:12:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-12-02 18:12:31,604 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.25) internal successors, (162), 61 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 992 [2023-12-02 18:12:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:12:31,612 INFO L225 Difference]: With dead ends: 3216 [2023-12-02 18:12:31,612 INFO L226 Difference]: Without dead ends: 2064 [2023-12-02 18:12:31,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2151 GetRequests, 1903 SyntacticMatches, 51 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15779 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4874, Invalid=34528, Unknown=0, NotChecked=0, Total=39402 [2023-12-02 18:12:31,617 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 122 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 3698 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 3715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:12:31,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 514 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 18:12:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2023-12-02 18:12:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1864. [2023-12-02 18:12:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1799 states have (on average 1.0628126737076153) internal successors, (1912), 1799 states have internal predecessors, (1912), 3 states have call successors, (3), 2 states have call predecessors, (3), 61 states have return successors, (62), 62 states have call predecessors, (62), 2 states have call successors, (62) [2023-12-02 18:12:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 1977 transitions. [2023-12-02 18:12:32,093 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 1977 transitions. Word has length 992 [2023-12-02 18:12:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:12:32,094 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 1977 transitions. [2023-12-02 18:12:32,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.25) internal successors, (162), 61 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2023-12-02 18:12:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 1977 transitions. [2023-12-02 18:12:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2023-12-02 18:12:32,110 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:12:32,110 INFO L195 NwaCegarLoop]: trace histogram [245, 245, 245, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:12:32,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-02 18:12:32,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 18:12:32,311 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:12:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:12:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -970128813, now seen corresponding path program 16 times [2023-12-02 18:12:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:12:32,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672640300] [2023-12-02 18:12:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:12:32,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:12:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:12:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 99145 backedges. 53880 proven. 513 refuted. 0 times theorem prover too weak. 44752 trivial. 0 not checked. [2023-12-02 18:12:35,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:12:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672640300] [2023-12-02 18:12:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672640300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:12:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274196892] [2023-12-02 18:12:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:12:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:12:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:12:35,718 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:12:35,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 18:12:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:12:36,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 2303 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-02 18:12:36,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:12:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 99145 backedges. 43910 proven. 1971 refuted. 0 times theorem prover too weak. 53264 trivial. 0 not checked. [2023-12-02 18:12:37,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:13:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 99145 backedges. 43910 proven. 1971 refuted. 0 times theorem prover too weak. 53264 trivial. 0 not checked. [2023-12-02 18:13:19,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274196892] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:13:19,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841103218] [2023-12-02 18:13:19,821 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:13:19,821 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:13:19,821 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) [2023-12-02 18:13:19,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:13:19,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 58, 58] total 79 [2023-12-02 18:13:19,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940910671] [2023-12-02 18:13:19,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:13:19,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-12-02 18:13:19,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:13:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-12-02 18:13:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=5611, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 18:13:19,826 INFO L87 Difference]: Start difference. First operand 1864 states and 1977 transitions. Second operand has 79 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 67 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2023-12-02 18:13:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:13:25,012 INFO L93 Difference]: Finished difference Result 3511 states and 3726 transitions. [2023-12-02 18:13:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2023-12-02 18:13:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 67 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 1015 [2023-12-02 18:13:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:13:25,020 INFO L225 Difference]: With dead ends: 3511 [2023-12-02 18:13:25,020 INFO L226 Difference]: Without dead ends: 2445 [2023-12-02 18:13:25,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2225 GetRequests, 1941 SyntacticMatches, 56 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20927 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6476, Invalid=46194, Unknown=0, NotChecked=0, Total=52670 [2023-12-02 18:13:25,028 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 132 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 4263 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:13:25,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 533 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 4263 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 18:13:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2023-12-02 18:13:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2193. [2023-12-02 18:13:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2119 states have (on average 1.0556866446436999) internal successors, (2237), 2119 states have internal predecessors, (2237), 3 states have call successors, (3), 2 states have call predecessors, (3), 70 states have return successors, (71), 71 states have call predecessors, (71), 2 states have call successors, (71) [2023-12-02 18:13:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 2311 transitions. [2023-12-02 18:13:25,570 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 2311 transitions. Word has length 1015 [2023-12-02 18:13:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:13:25,571 INFO L495 AbstractCegarLoop]: Abstraction has 2193 states and 2311 transitions. [2023-12-02 18:13:25,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 67 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2023-12-02 18:13:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 2311 transitions. [2023-12-02 18:13:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1046 [2023-12-02 18:13:25,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:13:25,589 INFO L195 NwaCegarLoop]: trace histogram [255, 255, 255, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:13:25,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 18:13:25,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 18:13:25,789 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:13:25,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:13:25,790 INFO L85 PathProgramCache]: Analyzing trace with hash -921087533, now seen corresponding path program 17 times [2023-12-02 18:13:25,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:13:25,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424632092] [2023-12-02 18:13:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:13:25,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:13:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:13:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 106880 backedges. 58037 proven. 615 refuted. 0 times theorem prover too weak. 48228 trivial. 0 not checked. [2023-12-02 18:13:29,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:13:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424632092] [2023-12-02 18:13:29,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424632092] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:13:29,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500261006] [2023-12-02 18:13:29,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:13:29,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:13:29,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:13:29,620 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:13:29,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 18:13:30,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-12-02 18:13:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:13:30,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 18:13:30,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:13:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 106880 backedges. 50004 proven. 12166 refuted. 0 times theorem prover too weak. 44710 trivial. 0 not checked. [2023-12-02 18:13:31,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:13:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 106880 backedges. 50004 proven. 12166 refuted. 0 times theorem prover too weak. 44710 trivial. 0 not checked. [2023-12-02 18:13:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500261006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:13:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325983561] [2023-12-02 18:13:38,128 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:13:38,128 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:13:38,129 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) [2023-12-02 18:13:38,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:13:38,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 37, 37] total 121 [2023-12-02 18:13:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117037033] [2023-12-02 18:13:38,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:13:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2023-12-02 18:13:38,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:13:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2023-12-02 18:13:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=13116, Unknown=0, NotChecked=0, Total=14520 [2023-12-02 18:13:38,133 INFO L87 Difference]: Start difference. First operand 2193 states and 2311 transitions. Second operand has 121 states, 121 states have (on average 1.9421487603305785) internal successors, (235), 112 states have internal predecessors, (235), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2023-12-02 18:14:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:00,127 INFO L93 Difference]: Finished difference Result 12555 states and 14051 transitions. [2023-12-02 18:14:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2023-12-02 18:14:00,128 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.9421487603305785) internal successors, (235), 112 states have internal predecessors, (235), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 1045 [2023-12-02 18:14:00,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:00,156 INFO L225 Difference]: With dead ends: 12555 [2023-12-02 18:14:00,156 INFO L226 Difference]: Without dead ends: 10951 [2023-12-02 18:14:00,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2540 GetRequests, 2019 SyntacticMatches, 0 SemanticMatches, 521 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98353 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=28158, Invalid=244848, Unknown=0, NotChecked=0, Total=273006 [2023-12-02 18:14:00,176 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 3641 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 2755 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3641 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:00,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3641 Valid, 756 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2755 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 18:14:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10951 states. [2023-12-02 18:14:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10951 to 2669. [2023-12-02 18:14:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2585 states have (on average 1.0591876208897486) internal successors, (2738), 2585 states have internal predecessors, (2738), 3 states have call successors, (3), 2 states have call predecessors, (3), 80 states have return successors, (81), 81 states have call predecessors, (81), 2 states have call successors, (81) [2023-12-02 18:14:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 2822 transitions. [2023-12-02 18:14:01,308 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 2822 transitions. Word has length 1045 [2023-12-02 18:14:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:01,309 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 2822 transitions. [2023-12-02 18:14:01,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.9421487603305785) internal successors, (235), 112 states have internal predecessors, (235), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2023-12-02 18:14:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 2822 transitions. [2023-12-02 18:14:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1160 [2023-12-02 18:14:01,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:01,325 INFO L195 NwaCegarLoop]: trace histogram [293, 293, 293, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:14:01,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 18:14:01,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 18:14:01,526 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:14:01,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash 758846643, now seen corresponding path program 18 times [2023-12-02 18:14:01,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:01,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155195843] [2023-12-02 18:14:01,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:01,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 139009 backedges. 78648 proven. 726 refuted. 0 times theorem prover too weak. 59635 trivial. 0 not checked. [2023-12-02 18:14:06,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:06,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155195843] [2023-12-02 18:14:06,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155195843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:06,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834584859] [2023-12-02 18:14:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:14:06,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:06,294 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:06,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 18:14:07,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:14:07,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:14:07,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-02 18:14:07,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 139009 backedges. 30980 proven. 2262 refuted. 0 times theorem prover too weak. 105767 trivial. 0 not checked. [2023-12-02 18:14:10,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:14:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 139009 backedges. 30980 proven. 2262 refuted. 0 times theorem prover too weak. 105767 trivial. 0 not checked. [2023-12-02 18:14:17,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834584859] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:14:17,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1142747217] [2023-12-02 18:14:17,773 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:14:17,773 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:14:17,773 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) [2023-12-02 18:14:17,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:14:17,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 81, 81] total 213 [2023-12-02 18:14:17,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944884106] [2023-12-02 18:14:17,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:14:17,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2023-12-02 18:14:17,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2023-12-02 18:14:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7453, Invalid=37703, Unknown=0, NotChecked=0, Total=45156 [2023-12-02 18:14:17,780 INFO L87 Difference]: Start difference. First operand 2669 states and 2822 transitions. Second operand has 213 states, 213 states have (on average 1.619718309859155) internal successors, (345), 212 states have internal predecessors, (345), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:14:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:40,197 INFO L93 Difference]: Finished difference Result 11892 states and 13758 transitions. [2023-12-02 18:14:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-12-02 18:14:40,197 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.619718309859155) internal successors, (345), 212 states have internal predecessors, (345), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 1159 [2023-12-02 18:14:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:40,220 INFO L225 Difference]: With dead ends: 11892 [2023-12-02 18:14:40,220 INFO L226 Difference]: Without dead ends: 10627 [2023-12-02 18:14:40,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2622 GetRequests, 2159 SyntacticMatches, 0 SemanticMatches, 463 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61707 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=42429, Invalid=173331, Unknown=0, NotChecked=0, Total=215760 [2023-12-02 18:14:40,238 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2322 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2322 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:40,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2322 Valid, 890 Invalid, 3193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 18:14:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2023-12-02 18:14:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 3361. [2023-12-02 18:14:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3266 states have (on average 1.0609308022045316) internal successors, (3465), 3266 states have internal predecessors, (3465), 3 states have call successors, (3), 2 states have call predecessors, (3), 91 states have return successors, (92), 92 states have call predecessors, (92), 2 states have call successors, (92) [2023-12-02 18:14:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 3560 transitions. [2023-12-02 18:14:41,490 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 3560 transitions. Word has length 1159 [2023-12-02 18:14:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:41,490 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 3560 transitions. [2023-12-02 18:14:41,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.619718309859155) internal successors, (345), 212 states have internal predecessors, (345), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:14:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 3560 transitions. [2023-12-02 18:14:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1311 [2023-12-02 18:14:41,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:41,546 INFO L195 NwaCegarLoop]: trace histogram [340, 340, 340, 28, 27, 27, 27, 27, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:14:41,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 18:14:41,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 18:14:41,746 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:14:41,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash -790966506, now seen corresponding path program 19 times [2023-12-02 18:14:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:41,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589516073] [2023-12-02 18:14:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 184999 backedges. 103809 proven. 846 refuted. 0 times theorem prover too weak. 80344 trivial. 0 not checked. [2023-12-02 18:14:47,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589516073] [2023-12-02 18:14:47,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589516073] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476442042] [2023-12-02 18:14:47,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:14:47,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:47,573 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:47,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 18:14:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:48,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 18:14:48,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 184999 backedges. 92084 proven. 4083 refuted. 0 times theorem prover too weak. 88832 trivial. 0 not checked. [2023-12-02 18:14:50,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 184999 backedges. 92084 proven. 4083 refuted. 0 times theorem prover too weak. 88832 trivial. 0 not checked. [2023-12-02 18:16:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476442042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713823600] [2023-12-02 18:16:00,597 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:16:00,597 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:16:00,597 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) [2023-12-02 18:16:00,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:16:00,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 73, 73] total 100 [2023-12-02 18:16:00,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620247379] [2023-12-02 18:16:00,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:16:00,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-12-02 18:16:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:16:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-12-02 18:16:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=9055, Unknown=0, NotChecked=0, Total=9900 [2023-12-02 18:16:00,603 INFO L87 Difference]: Start difference. First operand 3361 states and 3560 transitions. Second operand has 100 states, 100 states have (on average 2.18) internal successors, (218), 85 states have internal predecessors, (218), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-02 18:16:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:11,667 INFO L93 Difference]: Finished difference Result 5881 states and 6240 transitions. [2023-12-02 18:16:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2023-12-02 18:16:11,668 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.18) internal successors, (218), 85 states have internal predecessors, (218), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 1310 [2023-12-02 18:16:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:11,676 INFO L225 Difference]: With dead ends: 5881 [2023-12-02 18:16:11,676 INFO L226 Difference]: Without dead ends: 4329 [2023-12-02 18:16:11,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2911 GetRequests, 2507 SyntacticMatches, 71 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43544 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13613, Invalid=98277, Unknown=0, NotChecked=0, Total=111890 [2023-12-02 18:16:11,713 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 166 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 8783 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 8808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 8783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:11,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 909 Invalid, 8808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 8783 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 18:16:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2023-12-02 18:16:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 3885. [2023-12-02 18:16:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3778 states have (on average 1.0545262043409211) internal successors, (3984), 3778 states have internal predecessors, (3984), 3 states have call successors, (3), 2 states have call predecessors, (3), 103 states have return successors, (104), 104 states have call predecessors, (104), 2 states have call successors, (104) [2023-12-02 18:16:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 4091 transitions. [2023-12-02 18:16:13,193 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 4091 transitions. Word has length 1310 [2023-12-02 18:16:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:13,194 INFO L495 AbstractCegarLoop]: Abstraction has 3885 states and 4091 transitions. [2023-12-02 18:16:13,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.18) internal successors, (218), 85 states have internal predecessors, (218), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2023-12-02 18:16:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 4091 transitions. [2023-12-02 18:16:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1319 [2023-12-02 18:16:13,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:13,212 INFO L195 NwaCegarLoop]: trace histogram [346, 346, 346, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:16:13,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 18:16:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 18:16:13,412 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:16:13,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash -307823978, now seen corresponding path program 20 times [2023-12-02 18:16:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:16:13,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35150793] [2023-12-02 18:16:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:13,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:16:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 191055 backedges. 108189 proven. 975 refuted. 0 times theorem prover too weak. 81891 trivial. 0 not checked. [2023-12-02 18:16:19,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:16:19,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35150793] [2023-12-02 18:16:19,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35150793] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:16:19,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228051375] [2023-12-02 18:16:19,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:16:19,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:16:19,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:16:19,699 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:16:19,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 18:16:21,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-12-02 18:16:21,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:16:21,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 18:16:21,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 191055 backedges. 94478 proven. 39795 refuted. 0 times theorem prover too weak. 56782 trivial. 0 not checked. [2023-12-02 18:16:23,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 191055 backedges. 94478 proven. 39795 refuted. 0 times theorem prover too weak. 56782 trivial. 0 not checked. [2023-12-02 18:16:35,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228051375] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275051630] [2023-12-02 18:16:35,292 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:16:35,292 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:16:35,292 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) [2023-12-02 18:16:35,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:16:35,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 46, 46] total 151 [2023-12-02 18:16:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072819870] [2023-12-02 18:16:35,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:16:35,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-12-02 18:16:35,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:16:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-12-02 18:16:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2127, Invalid=20523, Unknown=0, NotChecked=0, Total=22650 [2023-12-02 18:16:35,298 INFO L87 Difference]: Start difference. First operand 3885 states and 4091 transitions. Second operand has 151 states, 151 states have (on average 1.900662251655629) internal successors, (287), 140 states have internal predecessors, (287), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2023-12-02 18:17:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:17:22,374 INFO L93 Difference]: Finished difference Result 20489 states and 22770 transitions. [2023-12-02 18:17:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 599 states. [2023-12-02 18:17:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.900662251655629) internal successors, (287), 140 states have internal predecessors, (287), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 1318 [2023-12-02 18:17:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:17:22,423 INFO L225 Difference]: With dead ends: 20489 [2023-12-02 18:17:22,423 INFO L226 Difference]: Without dead ends: 17681 [2023-12-02 18:17:22,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3289 GetRequests, 2547 SyntacticMatches, 0 SemanticMatches, 742 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208170 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=52262, Invalid=500530, Unknown=0, NotChecked=0, Total=552792 [2023-12-02 18:17:22,477 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3857 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3857 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:17:22,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3857 Valid, 1253 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 18:17:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17681 states. [2023-12-02 18:17:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17681 to 4644. [2023-12-02 18:17:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4644 states, 4524 states have (on average 1.0559239610963749) internal successors, (4777), 4524 states have internal predecessors, (4777), 3 states have call successors, (3), 2 states have call predecessors, (3), 116 states have return successors, (117), 117 states have call predecessors, (117), 2 states have call successors, (117) [2023-12-02 18:17:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4644 states to 4644 states and 4897 transitions. [2023-12-02 18:17:25,287 INFO L78 Accepts]: Start accepts. Automaton has 4644 states and 4897 transitions. Word has length 1318 [2023-12-02 18:17:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:17:25,288 INFO L495 AbstractCegarLoop]: Abstraction has 4644 states and 4897 transitions. [2023-12-02 18:17:25,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.900662251655629) internal successors, (287), 140 states have internal predecessors, (287), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2023-12-02 18:17:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4644 states and 4897 transitions. [2023-12-02 18:17:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1461 [2023-12-02 18:17:25,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:17:25,310 INFO L195 NwaCegarLoop]: trace histogram [390, 390, 390, 28, 27, 27, 27, 27, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1] [2023-12-02 18:17:25,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 18:17:25,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 18:17:25,511 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:17:25,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:17:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1470117130, now seen corresponding path program 21 times [2023-12-02 18:17:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:17:25,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106884848] [2023-12-02 18:17:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:17:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:17:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:17:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 240924 backedges. 96255 proven. 17140 refuted. 0 times theorem prover too weak. 127529 trivial. 0 not checked. [2023-12-02 18:17:35,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:17:35,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106884848] [2023-12-02 18:17:35,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106884848] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:17:35,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319059907] [2023-12-02 18:17:35,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:17:35,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:17:35,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:17:35,948 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:17:35,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 18:17:37,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:17:37,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:17:37,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 3336 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-02 18:17:37,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:17:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 240924 backedges. 96295 proven. 17087 refuted. 0 times theorem prover too weak. 127542 trivial. 0 not checked. [2023-12-02 18:17:38,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:18:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 240924 backedges. 96295 proven. 17087 refuted. 0 times theorem prover too weak. 127542 trivial. 0 not checked. [2023-12-02 18:18:46,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319059907] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:18:46,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18165153] [2023-12-02 18:18:46,194 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:18:46,194 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:18:46,194 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) [2023-12-02 18:18:46,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:18:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 78 [2023-12-02 18:18:46,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279364601] [2023-12-02 18:18:46,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:18:46,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-12-02 18:18:46,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:18:46,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-12-02 18:18:46,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=5350, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 18:18:46,200 INFO L87 Difference]: Start difference. First operand 4644 states and 4897 transitions. Second operand has 78 states, 78 states have (on average 2.2564102564102564) internal successors, (176), 63 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-02 18:18:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:18:53,368 INFO L93 Difference]: Finished difference Result 5851 states and 6251 transitions. [2023-12-02 18:18:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-12-02 18:18:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.2564102564102564) internal successors, (176), 63 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 1460 [2023-12-02 18:18:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:18:53,372 INFO L225 Difference]: With dead ends: 5851 [2023-12-02 18:18:53,373 INFO L226 Difference]: Without dead ends: 1623 [2023-12-02 18:18:53,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3217 GetRequests, 2846 SyntacticMatches, 72 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38873 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=16842, Invalid=73458, Unknown=0, NotChecked=0, Total=90300 [2023-12-02 18:18:53,380 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 561 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:18:53,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 284 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:18:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2023-12-02 18:18:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1623. [2023-12-02 18:18:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1593 states have (on average 1.0929064657878218) internal successors, (1741), 1593 states have internal predecessors, (1741), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:18:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 1771 transitions. [2023-12-02 18:18:54,575 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 1771 transitions. Word has length 1460 [2023-12-02 18:18:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:18:54,575 INFO L495 AbstractCegarLoop]: Abstraction has 1623 states and 1771 transitions. [2023-12-02 18:18:54,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.2564102564102564) internal successors, (176), 63 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-12-02 18:18:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 1771 transitions. [2023-12-02 18:18:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1504 [2023-12-02 18:18:54,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:18:54,592 INFO L195 NwaCegarLoop]: trace histogram [404, 404, 404, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1] [2023-12-02 18:18:54,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 18:18:54,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 18:18:54,793 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:18:54,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:18:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash -615646896, now seen corresponding path program 22 times [2023-12-02 18:18:54,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:18:54,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755362657] [2023-12-02 18:18:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:18:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:18:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:19:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 258349 backedges. 141988 proven. 1113 refuted. 0 times theorem prover too weak. 115248 trivial. 0 not checked. [2023-12-02 18:19:04,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:19:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755362657] [2023-12-02 18:19:04,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755362657] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:19:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259478917] [2023-12-02 18:19:04,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:19:04,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:19:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:19:04,229 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:19:04,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 18:19:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:19:06,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 3439 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-02 18:19:06,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:19:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 258349 backedges. 137973 proven. 6106 refuted. 0 times theorem prover too weak. 114270 trivial. 0 not checked. [2023-12-02 18:19:08,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:20:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 258349 backedges. 137973 proven. 6106 refuted. 0 times theorem prover too weak. 114270 trivial. 0 not checked. [2023-12-02 18:20:46,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259478917] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:20:46,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523987341] [2023-12-02 18:20:46,869 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:20:46,869 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:20:46,869 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) [2023-12-02 18:20:46,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:20:46,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 83, 83] total 114 [2023-12-02 18:20:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693399679] [2023-12-02 18:20:46,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:20:46,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-12-02 18:20:46,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:20:46,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-12-02 18:20:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1076, Invalid=11806, Unknown=0, NotChecked=0, Total=12882 [2023-12-02 18:20:46,874 INFO L87 Difference]: Start difference. First operand 1623 states and 1771 transitions. Second operand has 114 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 97 states have internal predecessors, (246), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2023-12-02 18:21:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:21:01,812 INFO L93 Difference]: Finished difference Result 2740 states and 3037 transitions. [2023-12-02 18:21:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2023-12-02 18:21:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 97 states have internal predecessors, (246), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) Word has length 1503 [2023-12-02 18:21:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:21:01,816 INFO L225 Difference]: With dead ends: 2740 [2023-12-02 18:21:01,816 INFO L226 Difference]: Without dead ends: 1635 [2023-12-02 18:21:01,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3371 GetRequests, 2877 SyntacticMatches, 81 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65416 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=20831, Invalid=150979, Unknown=0, NotChecked=0, Total=171810 [2023-12-02 18:21:01,825 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 195 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 10592 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 10608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 10592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:21:01,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 855 Invalid, 10608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 10592 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 18:21:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2023-12-02 18:21:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1635. [2023-12-02 18:21:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1605 states have (on average 1.0884735202492213) internal successors, (1747), 1605 states have internal predecessors, (1747), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 18:21:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 1777 transitions. [2023-12-02 18:21:03,075 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 1777 transitions. Word has length 1503 [2023-12-02 18:21:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:21:03,075 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 1777 transitions. [2023-12-02 18:21:03,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 97 states have internal predecessors, (246), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2023-12-02 18:21:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 1777 transitions. [2023-12-02 18:21:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1526 [2023-12-02 18:21:03,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:21:03,092 INFO L195 NwaCegarLoop]: trace histogram [408, 408, 408, 29, 28, 28, 28, 28, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1] [2023-12-02 18:21:03,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 18:21:03,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:21:03,292 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:21:03,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:21:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash -791507696, now seen corresponding path program 23 times [2023-12-02 18:21:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:21:03,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166004467] [2023-12-02 18:21:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:21:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:21:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:21:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 263588 backedges. 145872 proven. 1260 refuted. 0 times theorem prover too weak. 116456 trivial. 0 not checked. [2023-12-02 18:21:13,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:21:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166004467] [2023-12-02 18:21:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166004467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:21:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107235124] [2023-12-02 18:21:13,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:21:13,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:21:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:21:13,081 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:21:13,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 18:21:15,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-12-02 18:21:15,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:21:15,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 18:21:15,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:21:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 263588 backedges. 127455 proven. 72271 refuted. 0 times theorem prover too weak. 63862 trivial. 0 not checked. [2023-12-02 18:21:18,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:21:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 263588 backedges. 127455 proven. 72271 refuted. 0 times theorem prover too weak. 63862 trivial. 0 not checked. [2023-12-02 18:21:37,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107235124] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:21:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261374425] [2023-12-02 18:21:37,847 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:21:37,847 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:21:37,848 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) [2023-12-02 18:21:37,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:21:37,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 53, 53] total 173 [2023-12-02 18:21:37,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432725796] [2023-12-02 18:21:37,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:21:37,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2023-12-02 18:21:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:21:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2023-12-02 18:21:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2731, Invalid=27025, Unknown=0, NotChecked=0, Total=29756 [2023-12-02 18:21:37,856 INFO L87 Difference]: Start difference. First operand 1635 states and 1777 transitions. Second operand has 173 states, 173 states have (on average 1.8901734104046244) internal successors, (327), 160 states have internal predecessors, (327), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2023-12-02 18:22:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:22:30,419 INFO L93 Difference]: Finished difference Result 7840 states and 8828 transitions. [2023-12-02 18:22:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 782 states. [2023-12-02 18:22:30,419 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.8901734104046244) internal successors, (327), 160 states have internal predecessors, (327), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 1525 [2023-12-02 18:22:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:22:30,429 INFO L225 Difference]: With dead ends: 7840 [2023-12-02 18:22:30,429 INFO L226 Difference]: Without dead ends: 5280 [2023-12-02 18:22:30,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3894 GetRequests, 2947 SyntacticMatches, 0 SemanticMatches, 947 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349845 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=79581, Invalid=820071, Unknown=0, NotChecked=0, Total=899652 [2023-12-02 18:22:30,477 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6133 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 4704 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6133 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 4850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 4704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:22:30,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6133 Valid, 1322 Invalid, 4850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 4704 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 18:22:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2023-12-02 18:22:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 1980. [2023-12-02 18:22:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1946 states have (on average 1.0904419321685508) internal successors, (2122), 1946 states have internal predecessors, (2122), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 31 states have call predecessors, (31), 2 states have call successors, (31) [2023-12-02 18:22:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2156 transitions. [2023-12-02 18:22:32,534 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2156 transitions. Word has length 1525 [2023-12-02 18:22:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:22:32,535 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2156 transitions. [2023-12-02 18:22:32,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.8901734104046244) internal successors, (327), 160 states have internal predecessors, (327), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2023-12-02 18:22:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2156 transitions. [2023-12-02 18:22:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1776 [2023-12-02 18:22:32,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:22:32,556 INFO L195 NwaCegarLoop]: trace histogram [484, 484, 484, 31, 30, 30, 30, 30, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1] [2023-12-02 18:22:32,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 18:22:32,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:22:32,757 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 18:22:32,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:22:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash -225333104, now seen corresponding path program 24 times [2023-12-02 18:22:32,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:22:32,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548891365] [2023-12-02 18:22:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:22:32,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:22:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:22:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 368713 backedges. 139749 proven. 22288 refuted. 0 times theorem prover too weak. 206676 trivial. 0 not checked. [2023-12-02 18:22:48,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:22:48,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548891365] [2023-12-02 18:22:48,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548891365] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:22:48,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597443494] [2023-12-02 18:22:48,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:22:48,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:22:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:22:48,720 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:22:48,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc866ceb-9029-4fd9-a1e4-7d08279c7538/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 18:22:51,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:22:51,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:22:51,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 4063 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-02 18:22:51,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:22:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 368713 backedges. 139792 proven. 22230 refuted. 0 times theorem prover too weak. 206691 trivial. 0 not checked. [2023-12-02 18:22:52,259 INFO L327 TraceCheckSpWp]: Computing backward predicates...