./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 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_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 76955366716759eb9478710f6ef46e3de93d252b9c3177ff4beaca56ee5c75a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:54:23,923 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:54:24,029 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-12 00:54:24,036 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:54:24,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:54:24,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:54:24,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:54:24,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:54:24,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:54:24,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:54:24,081 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:54:24,082 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:54:24,082 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:54:24,084 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:54:24,085 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:54:24,085 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:54:24,086 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:54:24,086 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:54:24,087 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:54:24,087 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:54:24,088 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:54:24,088 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:54:24,089 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:54:24,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:54:24,090 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:54:24,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:54:24,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:54:24,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:54:24,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:54:24,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:54:24,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:54:24,094 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 00:54:24,094 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:54:24,095 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:54:24,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:54:24,095 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:54:24,096 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:54:24,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:54:24,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:54:24,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:54:24,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:54:24,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:54:24,097 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:54:24,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:54:24,098 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:54:24,098 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:54:24,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:54:24,099 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_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76955366716759eb9478710f6ef46e3de93d252b9c3177ff4beaca56ee5c75a7 [2023-11-12 00:54:24,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:54:24,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:54:24,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:54:24,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:54:24,510 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:54:24,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2023-11-12 00:54:27,836 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:54:28,043 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:54:28,043 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2023-11-12 00:54:28,050 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/data/6170c8f4c/03d0b380538d4e3fbcd364b4744e8b51/FLAGdd843f869 [2023-11-12 00:54:28,064 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/data/6170c8f4c/03d0b380538d4e3fbcd364b4744e8b51 [2023-11-12 00:54:28,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:54:28,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:54:28,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:28,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:54:28,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:54:28,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e5842c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28, skipping insertion in model container [2023-11-12 00:54:28,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,097 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:54:28,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:28,282 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:54:28,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:28,310 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:54:28,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28 WrapperNode [2023-11-12 00:54:28,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:28,312 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:28,312 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:54:28,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:54:28,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,349 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 19 [2023-11-12 00:54:28,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:28,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:54:28,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:54:28,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:54:28,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:54:28,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:54:28,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:54:28,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:54:28,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (1/1) ... [2023-11-12 00:54:28,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:54:28,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:28,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:54:28,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:54:28,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:54:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:54:28,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:54:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:54:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-11-12 00:54:28,461 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-11-12 00:54:28,538 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:54:28,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:54:28,682 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:54:28,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:54:28,723 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:54:28,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:28 BoogieIcfgContainer [2023-11-12 00:54:28,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:54:28,731 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:54:28,731 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:54:28,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:54:28,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:54:28" (1/3) ... [2023-11-12 00:54:28,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2b1901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:28, skipping insertion in model container [2023-11-12 00:54:28,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:28" (2/3) ... [2023-11-12 00:54:28,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2b1901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:28, skipping insertion in model container [2023-11-12 00:54:28,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:28" (3/3) ... [2023-11-12 00:54:28,740 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2023-11-12 00:54:28,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:54:28,768 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-12 00:54:28,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:54:28,838 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;@5a3c2cf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:54:28,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 00:54:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:54:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:54:28,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:28,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:54:28,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:28,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash 65646583, now seen corresponding path program 1 times [2023-11-12 00:54:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:28,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420527447] [2023-11-12 00:54:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:28,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:29,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420527447] [2023-11-12 00:54:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420527447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:29,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:54:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080928261] [2023-11-12 00:54:29,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:29,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:54:29,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:29,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:54:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:54:29,385 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.5) internal successors, (15), 14 states have internal predecessors, (15), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:29,522 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-11-12 00:54:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:54:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2023-11-12 00:54:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:29,536 INFO L225 Difference]: With dead ends: 36 [2023-11-12 00:54:29,536 INFO L226 Difference]: Without dead ends: 27 [2023-11-12 00:54:29,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:29,552 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:29,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-12 00:54:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-11-12 00:54:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:54:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-12 00:54:29,616 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2023-11-12 00:54:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:29,628 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-12 00:54:29,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-12 00:54:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:54:29,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:29,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:54:29,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:54:29,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:29,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2035044128, now seen corresponding path program 1 times [2023-11-12 00:54:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:29,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765925357] [2023-11-12 00:54:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:29,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:29,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765925357] [2023-11-12 00:54:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765925357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:29,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:29,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:54:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698876528] [2023-11-12 00:54:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:29,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:54:29,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:54:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:54:29,747 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:29,801 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-12 00:54:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:54:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:54:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:29,803 INFO L225 Difference]: With dead ends: 24 [2023-11-12 00:54:29,804 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:54:29,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:29,807 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:29,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:54:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:54:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-12 00:54:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:54:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-12 00:54:29,818 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2023-11-12 00:54:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:29,819 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-12 00:54:29,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-12 00:54:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:54:29,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:29,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:29,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:54:29,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:29,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1315832336, now seen corresponding path program 1 times [2023-11-12 00:54:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:29,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137710939] [2023-11-12 00:54:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:29,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:29,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137710939] [2023-11-12 00:54:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137710939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765315004] [2023-11-12 00:54:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:29,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:29,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:29,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:30,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:54:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:30,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:54:30,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:30,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:30,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765315004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:54:30,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1351138173] [2023-11-12 00:54:30,319 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:54:30,320 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:30,329 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:54:30,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:54:30,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 00:54:30,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194702609] [2023-11-12 00:54:30,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:54:30,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:54:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:54:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:54:30,353 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:30,641 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2023-11-12 00:54:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:54:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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 10 [2023-11-12 00:54:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:30,647 INFO L225 Difference]: With dead ends: 73 [2023-11-12 00:54:30,648 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 00:54:30,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:54:30,654 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 126 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:30,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 78 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:54:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 00:54:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2023-11-12 00:54:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.325) internal successors, (53), 42 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:54:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-11-12 00:54:30,694 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2023-11-12 00:54:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:30,695 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-11-12 00:54:30,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-11-12 00:54:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:54:30,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:30,697 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:30,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:54:30,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:30,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:30,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash -528864317, now seen corresponding path program 1 times [2023-11-12 00:54:30,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:30,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116003356] [2023-11-12 00:54:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:54:31,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116003356] [2023-11-12 00:54:31,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116003356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:31,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:54:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010640670] [2023-11-12 00:54:31,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:31,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:54:31,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:31,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:54:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:54:31,027 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:31,061 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2023-11-12 00:54:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:54:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 18 [2023-11-12 00:54:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:31,065 INFO L225 Difference]: With dead ends: 73 [2023-11-12 00:54:31,066 INFO L226 Difference]: Without dead ends: 71 [2023-11-12 00:54:31,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:54:31,069 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:31,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:54:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-12 00:54:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-12 00:54:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 56 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-12 00:54:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2023-11-12 00:54:31,095 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 18 [2023-11-12 00:54:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:31,096 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2023-11-12 00:54:31,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2023-11-12 00:54:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:54:31,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:31,099 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:31,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:54:31,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:31,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 207781312, now seen corresponding path program 1 times [2023-11-12 00:54:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:31,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684060108] [2023-11-12 00:54:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:54:31,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:31,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684060108] [2023-11-12 00:54:31,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684060108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:31,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:31,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:54:31,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125188966] [2023-11-12 00:54:31,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:31,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:31,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:31,172 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:31,188 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-11-12 00:54:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 23 [2023-11-12 00:54:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:31,190 INFO L225 Difference]: With dead ends: 71 [2023-11-12 00:54:31,190 INFO L226 Difference]: Without dead ends: 70 [2023-11-12 00:54:31,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:31,192 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:31,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:54:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-12 00:54:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-12 00:54:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-12 00:54:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2023-11-12 00:54:31,206 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 23 [2023-11-12 00:54:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:31,207 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2023-11-12 00:54:31,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:54:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2023-11-12 00:54:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:54:31,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:31,209 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1] [2023-11-12 00:54:31,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:54:31,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:31,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1826453303, now seen corresponding path program 2 times [2023-11-12 00:54:31,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:31,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685788827] [2023-11-12 00:54:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:31,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:31,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685788827] [2023-11-12 00:54:31,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685788827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:31,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988791067] [2023-11-12 00:54:31,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:54:31,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:31,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:31,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:31,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:54:31,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 00:54:31,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:54:31,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:54:31,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:31,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:31,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988791067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:54:31,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195299211] [2023-11-12 00:54:31,905 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:54:31,905 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:31,906 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:54:31,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:54:31,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-11-12 00:54:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245686769] [2023-11-12 00:54:31,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:54:31,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:54:31,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:54:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:54:31,910 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 24 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:32,399 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2023-11-12 00:54:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 00:54:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-12 00:54:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:32,404 INFO L225 Difference]: With dead ends: 187 [2023-11-12 00:54:32,404 INFO L226 Difference]: Without dead ends: 155 [2023-11-12 00:54:32,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=389, Invalid=1017, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 00:54:32,411 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 298 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:32,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 177 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:54:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-12 00:54:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2023-11-12 00:54:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 115 states have internal predecessors, (132), 12 states have call successors, (12), 11 states have call predecessors, (12), 16 states have return successors, (18), 18 states have call predecessors, (18), 11 states have call successors, (18) [2023-11-12 00:54:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2023-11-12 00:54:32,433 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 25 [2023-11-12 00:54:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:32,433 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2023-11-12 00:54:32,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2023-11-12 00:54:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 00:54:32,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:32,436 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 00:54:32,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:32,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:32,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:32,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash 672735076, now seen corresponding path program 1 times [2023-11-12 00:54:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:32,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340225841] [2023-11-12 00:54:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-12 00:54:32,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:32,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340225841] [2023-11-12 00:54:32,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340225841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:32,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538290529] [2023-11-12 00:54:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:32,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:32,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:32,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:32,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:54:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:32,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:54:32,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:54:33,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:54:33,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538290529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:54:33,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108309278] [2023-11-12 00:54:33,474 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-12 00:54:33,474 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:33,474 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:54:33,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:54:33,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 15] total 29 [2023-11-12 00:54:33,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46064330] [2023-11-12 00:54:33,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:54:33,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 00:54:33,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:33,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 00:54:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:54:33,482 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 29 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 21 states have internal predecessors, (67), 13 states have call successors, (14), 9 states have call predecessors, (14), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 00:54:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:34,074 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2023-11-12 00:54:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 00:54:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 21 states have internal predecessors, (67), 13 states have call successors, (14), 9 states have call predecessors, (14), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2023-11-12 00:54:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:34,078 INFO L225 Difference]: With dead ends: 207 [2023-11-12 00:54:34,078 INFO L226 Difference]: Without dead ends: 141 [2023-11-12 00:54:34,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 00:54:34,081 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 160 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:34,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 385 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:54:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-12 00:54:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2023-11-12 00:54:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 105 states have internal predecessors, (118), 12 states have call successors, (12), 11 states have call predecessors, (12), 13 states have return successors, (16), 16 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-12 00:54:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2023-11-12 00:54:34,100 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 39 [2023-11-12 00:54:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:34,100 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2023-11-12 00:54:34,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 21 states have internal predecessors, (67), 13 states have call successors, (14), 9 states have call predecessors, (14), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 00:54:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2023-11-12 00:54:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 00:54:34,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:34,103 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1] [2023-11-12 00:54:34,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:34,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:54:34,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:34,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -816224745, now seen corresponding path program 3 times [2023-11-12 00:54:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:34,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009936409] [2023-11-12 00:54:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:34,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:34,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009936409] [2023-11-12 00:54:34,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009936409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995548483] [2023-11-12 00:54:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:54:34,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:34,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:34,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:54:35,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:54:35,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:54:35,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:54:35,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:35,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:35,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995548483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:54:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573468311] [2023-11-12 00:54:35,939 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:54:35,939 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:35,939 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:54:35,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:54:35,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2023-11-12 00:54:35,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979346221] [2023-11-12 00:54:35,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:54:35,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-12 00:54:35,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-12 00:54:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-11-12 00:54:35,945 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 48 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 25 states have internal predecessors, (88), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:37,597 INFO L93 Difference]: Finished difference Result 437 states and 469 transitions. [2023-11-12 00:54:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-12 00:54:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 25 states have internal predecessors, (88), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-12 00:54:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:37,612 INFO L225 Difference]: With dead ends: 437 [2023-11-12 00:54:37,612 INFO L226 Difference]: Without dead ends: 385 [2023-11-12 00:54:37,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1742, Invalid=4578, Unknown=0, NotChecked=0, Total=6320 [2023-11-12 00:54:37,619 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 627 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:37,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 449 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-12 00:54:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 363. [2023-11-12 00:54:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 290 states have (on average 1.1206896551724137) internal successors, (325), 289 states have internal predecessors, (325), 24 states have call successors, (24), 23 states have call predecessors, (24), 47 states have return successors, (50), 50 states have call predecessors, (50), 23 states have call successors, (50) [2023-11-12 00:54:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 399 transitions. [2023-11-12 00:54:37,656 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 399 transitions. Word has length 55 [2023-11-12 00:54:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 399 transitions. [2023-11-12 00:54:37,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 25 states have internal predecessors, (88), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 399 transitions. [2023-11-12 00:54:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 00:54:37,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:37,662 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-11-12 00:54:37,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 00:54:37,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:37,869 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:37,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash 343692115, now seen corresponding path program 2 times [2023-11-12 00:54:37,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:37,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829225849] [2023-11-12 00:54:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:37,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 6 proven. 297 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:54:38,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829225849] [2023-11-12 00:54:38,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829225849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814632424] [2023-11-12 00:54:38,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:54:38,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:38,506 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:38,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:54:38,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:54:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:54:38,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:54:38,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-12 00:54:38,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-12 00:54:39,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814632424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:54:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523637697] [2023-11-12 00:54:39,019 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-12 00:54:39,019 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:39,020 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:54:39,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:54:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 37 [2023-11-12 00:54:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059689804] [2023-11-12 00:54:39,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:54:39,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-12 00:54:39,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-12 00:54:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:54:39,026 INFO L87 Difference]: Start difference. First operand 363 states and 399 transitions. Second operand has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 28 states have internal predecessors, (85), 12 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:54:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:40,146 INFO L93 Difference]: Finished difference Result 720 states and 820 transitions. [2023-11-12 00:54:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-12 00:54:40,147 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 28 states have internal predecessors, (85), 12 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2023-11-12 00:54:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:40,154 INFO L225 Difference]: With dead ends: 720 [2023-11-12 00:54:40,154 INFO L226 Difference]: Without dead ends: 664 [2023-11-12 00:54:40,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=561, Invalid=3995, Unknown=0, NotChecked=0, Total=4556 [2023-11-12 00:54:40,163 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 295 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:40,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 359 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:54:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2023-11-12 00:54:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 655. [2023-11-12 00:54:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 526 states have (on average 1.064638783269962) internal successors, (560), 521 states have internal predecessors, (560), 24 states have call successors, (24), 23 states have call predecessors, (24), 103 states have return successors, (110), 110 states have call predecessors, (110), 23 states have call successors, (110) [2023-11-12 00:54:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 694 transitions. [2023-11-12 00:54:40,208 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 694 transitions. Word has length 74 [2023-11-12 00:54:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:40,208 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 694 transitions. [2023-11-12 00:54:40,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 28 states have internal predecessors, (85), 12 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:54:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 694 transitions. [2023-11-12 00:54:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 00:54:40,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:40,222 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 7, 7, 7, 7, 6, 1, 1, 1, 1] [2023-11-12 00:54:40,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:54:40,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:40,427 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:40,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash -267455334, now seen corresponding path program 3 times [2023-11-12 00:54:40,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:40,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141497498] [2023-11-12 00:54:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:40,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 18 proven. 354 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-12 00:54:41,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:41,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141497498] [2023-11-12 00:54:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141497498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:41,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556570609] [2023-11-12 00:54:41,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:54:41,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:41,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:41,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:54:41,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:54:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:54:41,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 00:54:41,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 18 proven. 354 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-12 00:54:41,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 18 proven. 420 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:54:44,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556570609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:54:44,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [820506979] [2023-11-12 00:54:44,477 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-12 00:54:44,477 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:44,478 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:54:44,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:54:44,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 29] total 43 [2023-11-12 00:54:44,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484096860] [2023-11-12 00:54:44,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:54:44,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-12 00:54:44,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-12 00:54:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1450, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 00:54:44,482 INFO L87 Difference]: Start difference. First operand 655 states and 694 transitions. Second operand has 43 states, 41 states have (on average 2.658536585365854) internal successors, (109), 30 states have internal predecessors, (109), 21 states have call successors, (21), 13 states have call predecessors, (21), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-11-12 00:54:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:45,252 INFO L93 Difference]: Finished difference Result 748 states and 786 transitions. [2023-11-12 00:54:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-12 00:54:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.658536585365854) internal successors, (109), 30 states have internal predecessors, (109), 21 states have call successors, (21), 13 states have call predecessors, (21), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 99 [2023-11-12 00:54:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:45,260 INFO L225 Difference]: With dead ends: 748 [2023-11-12 00:54:45,260 INFO L226 Difference]: Without dead ends: 477 [2023-11-12 00:54:45,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=817, Invalid=2965, Unknown=0, NotChecked=0, Total=3782 [2023-11-12 00:54:45,265 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 348 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:45,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 616 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:54:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-11-12 00:54:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 445. [2023-11-12 00:54:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 358 states have (on average 1.0754189944134078) internal successors, (385), 353 states have internal predecessors, (385), 24 states have call successors, (24), 23 states have call predecessors, (24), 61 states have return successors, (68), 68 states have call predecessors, (68), 23 states have call successors, (68) [2023-11-12 00:54:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 477 transitions. [2023-11-12 00:54:45,304 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 477 transitions. Word has length 99 [2023-11-12 00:54:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:45,305 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 477 transitions. [2023-11-12 00:54:45,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.658536585365854) internal successors, (109), 30 states have internal predecessors, (109), 21 states have call successors, (21), 13 states have call predecessors, (21), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-11-12 00:54:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 477 transitions. [2023-11-12 00:54:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-12 00:54:45,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:45,308 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1] [2023-11-12 00:54:45,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:54:45,516 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:45,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1601213481, now seen corresponding path program 4 times [2023-11-12 00:54:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766211104] [2023-11-12 00:54:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:47,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:47,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766211104] [2023-11-12 00:54:47,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766211104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:47,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127306864] [2023-11-12 00:54:47,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:54:47,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:47,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:47,392 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:47,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:54:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:47,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-12 00:54:47,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:47,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:54:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:50,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127306864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:54:50,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087728769] [2023-11-12 00:54:50,328 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:54:50,328 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:54:50,328 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:54:50,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:54:50,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2023-11-12 00:54:50,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192899696] [2023-11-12 00:54:50,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:54:50,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-12 00:54:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-12 00:54:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2023-11-12 00:54:50,337 INFO L87 Difference]: Start difference. First operand 445 states and 477 transitions. Second operand has 96 states, 93 states have (on average 1.978494623655914) internal successors, (184), 49 states have internal predecessors, (184), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:55,075 INFO L93 Difference]: Finished difference Result 1533 states and 1604 transitions. [2023-11-12 00:54:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-11-12 00:54:55,076 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 1.978494623655914) internal successors, (184), 49 states have internal predecessors, (184), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-12 00:54:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:55,140 INFO L225 Difference]: With dead ends: 1533 [2023-11-12 00:54:55,140 INFO L226 Difference]: Without dead ends: 1331 [2023-11-12 00:54:55,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5823 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7364, Invalid=19368, Unknown=0, NotChecked=0, Total=26732 [2023-11-12 00:54:55,156 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1836 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1838 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:55,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1838 Valid, 1169 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:54:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2023-11-12 00:54:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2023-11-12 00:54:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1030 states have (on average 1.0689320388349515) internal successors, (1101), 1025 states have internal predecessors, (1101), 48 states have call successors, (48), 47 states have call predecessors, (48), 205 states have return successors, (212), 212 states have call predecessors, (212), 47 states have call successors, (212) [2023-11-12 00:54:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1361 transitions. [2023-11-12 00:54:55,228 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1361 transitions. Word has length 115 [2023-11-12 00:54:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:55,230 INFO L495 AbstractCegarLoop]: Abstraction has 1285 states and 1361 transitions. [2023-11-12 00:54:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 1.978494623655914) internal successors, (184), 49 states have internal predecessors, (184), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:54:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1361 transitions. [2023-11-12 00:54:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-12 00:54:55,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:55,237 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 7, 7, 7, 7, 6, 1, 1, 1, 1] [2023-11-12 00:54:55,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:55,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:55,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:54:55,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 730899155, now seen corresponding path program 4 times [2023-11-12 00:54:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:55,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21266036] [2023-11-12 00:54:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 18 proven. 1311 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-12 00:54:57,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:57,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21266036] [2023-11-12 00:54:57,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21266036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:57,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023376823] [2023-11-12 00:54:57,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:54:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:57,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:57,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:57,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:54:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:57,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-12 00:54:57,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 18 proven. 1311 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-12 00:54:57,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:55:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 18 proven. 1377 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:55:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023376823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:55:01,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143938678] [2023-11-12 00:55:01,512 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-12 00:55:01,513 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:55:01,513 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:55:01,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:55:01,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 51] total 55 [2023-11-12 00:55:01,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974138855] [2023-11-12 00:55:01,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:55:01,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-12 00:55:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-12 00:55:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=2374, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 00:55:01,522 INFO L87 Difference]: Start difference. First operand 1285 states and 1361 transitions. Second operand has 55 states, 53 states have (on average 2.509433962264151) internal successors, (133), 36 states have internal predecessors, (133), 27 states have call successors, (28), 19 states have call predecessors, (28), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-11-12 00:55:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:02,825 INFO L93 Difference]: Finished difference Result 1450 states and 1525 transitions. [2023-11-12 00:55:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-12 00:55:02,826 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.509433962264151) internal successors, (133), 36 states have internal predecessors, (133), 27 states have call successors, (28), 19 states have call predecessors, (28), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 154 [2023-11-12 00:55:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:02,839 INFO L225 Difference]: With dead ends: 1450 [2023-11-12 00:55:02,840 INFO L226 Difference]: Without dead ends: 1299 [2023-11-12 00:55:02,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 265 SyntacticMatches, 39 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1390, Invalid=4930, Unknown=0, NotChecked=0, Total=6320 [2023-11-12 00:55:02,844 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 446 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:02,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 697 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:55:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2023-11-12 00:55:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1225. [2023-11-12 00:55:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 982 states have (on average 1.070264765784114) internal successors, (1051), 977 states have internal predecessors, (1051), 48 states have call successors, (48), 47 states have call predecessors, (48), 193 states have return successors, (200), 200 states have call predecessors, (200), 47 states have call successors, (200) [2023-11-12 00:55:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1299 transitions. [2023-11-12 00:55:02,919 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1299 transitions. Word has length 154 [2023-11-12 00:55:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:02,920 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1299 transitions. [2023-11-12 00:55:02,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.509433962264151) internal successors, (133), 36 states have internal predecessors, (133), 27 states have call successors, (28), 19 states have call predecessors, (28), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-11-12 00:55:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1299 transitions. [2023-11-12 00:55:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-12 00:55:02,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:02,924 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 7, 7, 7, 7, 6, 1, 1, 1, 1] [2023-11-12 00:55:02,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:55:03,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:03,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:55:03,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 873021235, now seen corresponding path program 5 times [2023-11-12 00:55:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:03,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881521499] [2023-11-12 00:55:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2023-11-12 00:55:03,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881521499] [2023-11-12 00:55:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881521499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:55:03,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307362526] [2023-11-12 00:55:03,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:55:03,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:03,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:03,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:03,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:55:03,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-12 00:55:03,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:55:03,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:55:03,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2023-11-12 00:55:03,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:55:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2023-11-12 00:55:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307362526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:55:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956791189] [2023-11-12 00:55:05,875 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-12 00:55:05,876 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:55:05,877 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:55:05,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:55:05,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-11-12 00:55:05,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424879915] [2023-11-12 00:55:05,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:55:05,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 00:55:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 00:55:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:55:05,889 INFO L87 Difference]: Start difference. First operand 1225 states and 1299 transitions. Second operand has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 32 states have internal predecessors, (68), 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) [2023-11-12 00:55:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:06,055 INFO L93 Difference]: Finished difference Result 2510 states and 2851 transitions. [2023-11-12 00:55:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 00:55:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 32 states have internal predecessors, (68), 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 164 [2023-11-12 00:55:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:06,072 INFO L225 Difference]: With dead ends: 2510 [2023-11-12 00:55:06,073 INFO L226 Difference]: Without dead ends: 2509 [2023-11-12 00:55:06,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:55:06,076 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:06,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:55:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2023-11-12 00:55:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2509. [2023-11-12 00:55:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2014 states have (on average 1.0342601787487586) internal successors, (2083), 2001 states have internal predecessors, (2083), 48 states have call successors, (48), 47 states have call predecessors, (48), 445 states have return successors, (460), 460 states have call predecessors, (460), 47 states have call successors, (460) [2023-11-12 00:55:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 2591 transitions. [2023-11-12 00:55:06,190 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 2591 transitions. Word has length 164 [2023-11-12 00:55:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:06,191 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 2591 transitions. [2023-11-12 00:55:06,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 32 states have internal predecessors, (68), 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) [2023-11-12 00:55:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 2591 transitions. [2023-11-12 00:55:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-12 00:55:06,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:06,198 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 15, 15, 15, 15, 14, 1, 1, 1, 1] [2023-11-12 00:55:06,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:55:06,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 00:55:06,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2023-11-12 00:55:06,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:06,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1392466355, now seen corresponding path program 6 times [2023-11-12 00:55:06,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:06,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182535250] [2023-11-12 00:55:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:06,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2023-11-12 00:55:07,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182535250] [2023-11-12 00:55:07,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182535250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:55:07,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718389471] [2023-11-12 00:55:07,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:55:07,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:07,636 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:07,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6539cab7-44ee-4c08-bdd0-e7cfbb12eae8/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:55:07,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:55:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:55:07,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 00:55:07,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2023-11-12 00:55:08,026 INFO L327 TraceCheckSpWp]: Computing backward predicates...