./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/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_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/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_00cf14a6-0936-40ff-987e-651d5343e5e5/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 133ba40f5b51c272364c51a4e246bcd97a40cd88b0bcd4bd92df8f8d6bb23a52 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:10:07,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:10:07,671 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-12 00:10:07,677 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:10:07,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:10:07,733 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:10:07,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:10:07,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:10:07,736 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:10:07,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:10:07,743 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:10:07,743 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:10:07,744 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:10:07,746 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:10:07,746 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:10:07,747 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:10:07,748 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:10:07,748 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:10:07,749 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:10:07,749 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:10:07,750 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:10:07,751 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:10:07,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:10:07,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:10:07,753 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:10:07,754 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:10:07,754 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:10:07,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:10:07,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:10:07,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:10:07,758 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:10:07,758 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 00:10:07,758 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:10:07,758 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:10:07,759 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:10:07,759 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:10:07,759 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:10:07,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:10:07,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:07,760 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:10:07,760 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:10:07,761 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:10:07,761 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:10:07,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:10:07,762 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:10:07,762 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:10:07,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:10:07,763 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_00cf14a6-0936-40ff-987e-651d5343e5e5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 133ba40f5b51c272364c51a4e246bcd97a40cd88b0bcd4bd92df8f8d6bb23a52 [2023-11-12 00:10:08,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:10:08,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:10:08,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:10:08,196 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:10:08,196 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:10:08,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2023-11-12 00:10:11,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:10:12,017 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:10:12,018 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/sv-benchmarks/c/loop-invgen/apache-get-tag.i.v+lhb-reducer.c [2023-11-12 00:10:12,030 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/data/6116d1ea7/298f3495f69e476cb028abde399baea9/FLAG5df6c56f0 [2023-11-12 00:10:12,050 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/data/6116d1ea7/298f3495f69e476cb028abde399baea9 [2023-11-12 00:10:12,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:10:12,055 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:10:12,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:12,058 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:10:12,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:10:12,066 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,067 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23fe3b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12, skipping insertion in model container [2023-11-12 00:10:12,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,114 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:10:12,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:12,393 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:10:12,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:12,470 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:10:12,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12 WrapperNode [2023-11-12 00:10:12,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:12,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:12,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:10:12,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:10:12,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,542 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 288 [2023-11-12 00:10:12,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:12,544 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:10:12,544 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:10:12,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:10:12,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,567 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:10:12,580 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:10:12,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:10:12,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:10:12,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (1/1) ... [2023-11-12 00:10:12,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:12,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:12,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:10:12,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:10:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-12 00:10:12,695 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-12 00:10:12,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:10:12,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:10:12,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:10:12,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:10:12,848 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:10:12,854 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:10:13,455 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:10:13,478 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:10:13,478 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:10:13,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:13 BoogieIcfgContainer [2023-11-12 00:10:13,482 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:10:13,486 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:10:13,486 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:10:13,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:10:13,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:10:12" (1/3) ... [2023-11-12 00:10:13,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6932999d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:13, skipping insertion in model container [2023-11-12 00:10:13,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:12" (2/3) ... [2023-11-12 00:10:13,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6932999d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:13, skipping insertion in model container [2023-11-12 00:10:13,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:13" (3/3) ... [2023-11-12 00:10:13,495 INFO L112 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+lhb-reducer.c [2023-11-12 00:10:13,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:10:13,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-12 00:10:13,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:10:13,652 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;@2899e473, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:10:13,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-12 00:10:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 75 states have internal predecessors, (105), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-12 00:10:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:10:13,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:13,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:10:13,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:13,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 278915, now seen corresponding path program 1 times [2023-11-12 00:10:13,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:13,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104941129] [2023-11-12 00:10:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:13,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:13,879 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 00:10:13,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104941129] [2023-11-12 00:10:13,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104941129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:13,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:13,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:10:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803721154] [2023-11-12 00:10:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:13,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:10:13,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:10:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:10:13,934 INFO L87 Difference]: Start difference. First operand has 95 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 75 states have internal predecessors, (105), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:14,056 INFO L93 Difference]: Finished difference Result 97 states and 142 transitions. [2023-11-12 00:10:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:10:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-12 00:10:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:14,068 INFO L225 Difference]: With dead ends: 97 [2023-11-12 00:10:14,068 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 00:10:14,072 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 00:10:14,077 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:14,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 176 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 00:10:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-12 00:10:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-12 00:10:14,118 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 3 [2023-11-12 00:10:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:14,119 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-12 00:10:14,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-12 00:10:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:10:14,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:14,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:10:14,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:10:14,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:14,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash 8646406, now seen corresponding path program 1 times [2023-11-12 00:10:14,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:14,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7660567] [2023-11-12 00:10:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:14,176 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 00:10:14,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:14,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7660567] [2023-11-12 00:10:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7660567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:14,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:14,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:10:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588082852] [2023-11-12 00:10:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:14,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:10:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:10:14,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:10:14,181 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:14,215 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2023-11-12 00:10:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:10:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:10:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:14,217 INFO L225 Difference]: With dead ends: 45 [2023-11-12 00:10:14,217 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 00:10:14,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 00:10:14,219 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 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 00:10:14,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:10:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 00:10:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-12 00:10:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-11-12 00:10:14,235 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 4 [2023-11-12 00:10:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:14,235 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-11-12 00:10:14,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-11-12 00:10:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:10:14,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:14,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:14,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:10:14,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:14,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash -767232078, now seen corresponding path program 1 times [2023-11-12 00:10:14,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:14,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193975658] [2023-11-12 00:10:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:14,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:14,340 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 00:10:14,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:14,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193975658] [2023-11-12 00:10:14,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193975658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:14,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:14,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:10:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601816130] [2023-11-12 00:10:14,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:10:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:10:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:10:14,344 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:14,441 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2023-11-12 00:10:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:10:14,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 00:10:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:14,444 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:10:14,444 INFO L226 Difference]: Without dead ends: 50 [2023-11-12 00:10:14,444 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 00:10:14,446 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:14,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-12 00:10:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-12 00:10:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-11-12 00:10:14,468 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 10 [2023-11-12 00:10:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:14,470 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-11-12 00:10:14,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-11-12 00:10:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:10:14,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:14,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:14,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:10:14,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:14,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash -881435779, now seen corresponding path program 1 times [2023-11-12 00:10:14,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:14,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740248977] [2023-11-12 00:10:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:14,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:14,643 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 00:10:14,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740248977] [2023-11-12 00:10:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740248977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:14,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:14,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:10:14,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042566223] [2023-11-12 00:10:14,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:14,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:10:14,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:14,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:10:14,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:10:14,648 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:14,759 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-11-12 00:10:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:10:14,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-12 00:10:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:14,761 INFO L225 Difference]: With dead ends: 50 [2023-11-12 00:10:14,762 INFO L226 Difference]: Without dead ends: 46 [2023-11-12 00:10:14,762 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 00:10:14,764 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:14,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-12 00:10:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-12 00:10:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-11-12 00:10:14,773 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 17 [2023-11-12 00:10:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:14,774 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-11-12 00:10:14,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-11-12 00:10:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:10:14,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:14,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:14,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:10:14,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:14,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1554705260, now seen corresponding path program 1 times [2023-11-12 00:10:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564374335] [2023-11-12 00:10:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:14,974 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 00:10:14,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564374335] [2023-11-12 00:10:14,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564374335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:14,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:14,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:10:14,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196710867] [2023-11-12 00:10:14,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:14,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:10:14,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:14,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:10:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:10:14,979 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:15,122 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-11-12 00:10:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:10:15,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 00:10:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:15,134 INFO L225 Difference]: With dead ends: 75 [2023-11-12 00:10:15,135 INFO L226 Difference]: Without dead ends: 71 [2023-11-12 00:10:15,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:10:15,142 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:15,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:10:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-12 00:10:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-12 00:10:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2023-11-12 00:10:15,163 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 18 [2023-11-12 00:10:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:15,165 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2023-11-12 00:10:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2023-11-12 00:10:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:10:15,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:15,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:10:15,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:15,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1976390721, now seen corresponding path program 1 times [2023-11-12 00:10:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:15,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097878019] [2023-11-12 00:10:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:15,416 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 00:10:15,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097878019] [2023-11-12 00:10:15,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097878019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:10:15,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:10:15,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:10:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468231038] [2023-11-12 00:10:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:10:15,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:10:15,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:10:15,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:10:15,421 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:15,612 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2023-11-12 00:10:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:10:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 00:10:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:15,621 INFO L225 Difference]: With dead ends: 101 [2023-11-12 00:10:15,622 INFO L226 Difference]: Without dead ends: 97 [2023-11-12 00:10:15,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:10:15,631 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:15,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 33 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:10:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-12 00:10:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-12 00:10:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 96 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2023-11-12 00:10:15,655 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 24 [2023-11-12 00:10:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:15,656 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2023-11-12 00:10:15,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2023-11-12 00:10:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 00:10:15,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:15,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:10:15,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:15,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash -369451034, now seen corresponding path program 1 times [2023-11-12 00:10:15,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:15,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857062600] [2023-11-12 00:10:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:15,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:15,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:15,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857062600] [2023-11-12 00:10:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857062600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:15,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911030014] [2023-11-12 00:10:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:15,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:15,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:15,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:10:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:15,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:10:15,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:16,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:16,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911030014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:16,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354685586] [2023-11-12 00:10:16,237 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:10:16,238 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:16,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:16,250 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:16,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:21,137 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:25,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1105#(and (<= 0 |ULTIMATE.start_main_~__tmp_5~0#1|) (<= 0 |ULTIMATE.start_main_~__VERIFIER_assert__cond~4#1|) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483648)) (<= |ULTIMATE.start_main_~__VERIFIER_assert__cond~4#1| 1) (<= |ULTIMATE.start_main_~__tmp_5~0#1| 1) (<= 0 (+ 2147483649 |ULTIMATE.start_main_~main____CPAchecker_TMP_5~0#1|)) (<= 0 (+ 2147483649 |ULTIMATE.start_main_~main__tagbuf_len~0#1|)) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483647) (= |ULTIMATE.start_main_~__tmp_6~0#1| 1) (<= 2147483647 |ULTIMATE.start_main_~main__t~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~5#1| 1))' at error location [2023-11-12 00:10:25,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:25,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:10:25,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 00:10:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227452479] [2023-11-12 00:10:25,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:10:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:10:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:10:25,297 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 11 states, 10 states have (on average 7.1) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:25,585 INFO L93 Difference]: Finished difference Result 231 states and 272 transitions. [2023-11-12 00:10:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:10:25,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.1) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-12 00:10:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:25,588 INFO L225 Difference]: With dead ends: 231 [2023-11-12 00:10:25,588 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 00:10:25,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:10:25,589 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 227 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:25,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 63 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:10:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 00:10:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-11-12 00:10:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 223 states have (on average 1.1300448430493273) internal successors, (252), 226 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 252 transitions. [2023-11-12 00:10:25,605 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 252 transitions. Word has length 31 [2023-11-12 00:10:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:25,605 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 252 transitions. [2023-11-12 00:10:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.1) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 252 transitions. [2023-11-12 00:10:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 00:10:25,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:25,609 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:25,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:25,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:25,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:25,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1873939375, now seen corresponding path program 1 times [2023-11-12 00:10:25,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:25,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521416465] [2023-11-12 00:10:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:26,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521416465] [2023-11-12 00:10:26,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521416465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794090247] [2023-11-12 00:10:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:26,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:26,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:26,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:10:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:26,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:10:26,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:26,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794090247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224383854] [2023-11-12 00:10:26,609 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:10:26,609 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:26,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:26,610 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:26,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:29,413 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:33,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1977#(and (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 2147483648)) (<= |ULTIMATE.start_main_~__VERIFIER_assert__cond~9#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| 0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (= |ULTIMATE.start_main_~__tmp_9~0#1| 1) (= |ULTIMATE.start_main_~__tmp_5~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483648)) (<= 0 (+ ~__tmp_259_0~0 2147483648)) (<= |ULTIMATE.start_main_~main__tagbuf_len~0#1| 2147483646) (<= |ULTIMATE.start_main_~__tmp_10~0#1| 1) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~4#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_5~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~8#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_3~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_3~0#1| 2147483648)) (= |ULTIMATE.start_main_~main__t~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_7~0#1|) (not (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~9#1| 0)) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 2147483647) (= ~__return_305~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483647) (= |ULTIMATE.start_main_~__tmp_6~0#1| 1) (<= 2 |ULTIMATE.start_main_~main__tagbuf_len~0#1|) (<= 2147483647 |ULTIMATE.start_main_~main__t~0#1|) (= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 1) (<= ~__tmp_259_0~0 2147483647) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~5#1| 1) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~1#1| 1) (= ~__tmp_383_0~0 0))' at error location [2023-11-12 00:10:33,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:33,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:10:33,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-12 00:10:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377980821] [2023-11-12 00:10:33,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:10:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:10:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1291, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 00:10:33,455 INFO L87 Difference]: Start difference. First operand 227 states and 252 transitions. Second operand has 21 states, 20 states have (on average 6.75) internal successors, (135), 21 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:34,227 INFO L93 Difference]: Finished difference Result 491 states and 582 transitions. [2023-11-12 00:10:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 00:10:34,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 6.75) internal successors, (135), 21 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-12 00:10:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:34,231 INFO L225 Difference]: With dead ends: 491 [2023-11-12 00:10:34,231 INFO L226 Difference]: Without dead ends: 487 [2023-11-12 00:10:34,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=431, Invalid=1291, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 00:10:34,234 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 722 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:34,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 123 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:10:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-11-12 00:10:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 487. [2023-11-12 00:10:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 483 states have (on average 1.1221532091097308) internal successors, (542), 486 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 542 transitions. [2023-11-12 00:10:34,266 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 542 transitions. Word has length 63 [2023-11-12 00:10:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:34,266 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 542 transitions. [2023-11-12 00:10:34,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 6.75) internal successors, (135), 21 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 542 transitions. [2023-11-12 00:10:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-12 00:10:34,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:34,291 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:34,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:34,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:34,506 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:34,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:34,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1970299071, now seen corresponding path program 2 times [2023-11-12 00:10:34,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:34,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792070560] [2023-11-12 00:10:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:34,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:35,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:35,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792070560] [2023-11-12 00:10:35,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792070560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:35,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689476283] [2023-11-12 00:10:35,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:10:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:35,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:35,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:10:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:10:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:10:35,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:10:35,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2023-11-12 00:10:35,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2023-11-12 00:10:36,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689476283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840956853] [2023-11-12 00:10:36,130 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:10:36,131 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:36,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:36,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:36,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:39,408 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:46,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3768#(and (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 2147483648)) (<= |ULTIMATE.start_main_~__VERIFIER_assert__cond~9#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| 0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (= |ULTIMATE.start_main_~__tmp_9~0#1| 1) (= |ULTIMATE.start_main_~__tmp_5~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483648)) (<= 0 (+ ~__tmp_259_0~0 2147483648)) (<= |ULTIMATE.start_main_~main__tagbuf_len~0#1| 2147483646) (<= |ULTIMATE.start_main_~__tmp_10~0#1| 1) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~4#1| 1) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_5~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~8#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_3~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_3~0#1| 2147483648)) (= |ULTIMATE.start_main_~main__t~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_7~0#1|) (not (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~9#1| 0)) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 2147483647) (= ~__return_305~0 0) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483647) (= |ULTIMATE.start_main_~__tmp_6~0#1| 1) (<= 2 |ULTIMATE.start_main_~main__tagbuf_len~0#1|) (<= 2147483647 |ULTIMATE.start_main_~main__t~0#1|) (= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 1) (<= ~__tmp_259_0~0 2147483647) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~5#1| 1) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~1#1| 1) (= ~__tmp_383_0~0 0))' at error location [2023-11-12 00:10:46,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:46,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:10:46,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5, 5] total 29 [2023-11-12 00:10:46,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684362009] [2023-11-12 00:10:46,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 00:10:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 00:10:46,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=1834, Unknown=0, NotChecked=0, Total=2450 [2023-11-12 00:10:46,252 INFO L87 Difference]: Start difference. First operand 487 states and 542 transitions. Second operand has 30 states, 29 states have (on average 6.482758620689655) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:10:49,661 INFO L93 Difference]: Finished difference Result 761 states and 870 transitions. [2023-11-12 00:10:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-12 00:10:49,662 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 6.482758620689655) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-11-12 00:10:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:10:49,664 INFO L225 Difference]: With dead ends: 761 [2023-11-12 00:10:49,664 INFO L226 Difference]: Without dead ends: 178 [2023-11-12 00:10:49,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 344 SyntacticMatches, 10 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6684 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4204, Invalid=13088, Unknown=0, NotChecked=0, Total=17292 [2023-11-12 00:10:49,672 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3033 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3033 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:10:49,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3033 Valid, 154 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:10:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-12 00:10:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2023-11-12 00:10:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 175 states have (on average 1.022857142857143) internal successors, (179), 177 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2023-11-12 00:10:49,687 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 128 [2023-11-12 00:10:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:10:49,687 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2023-11-12 00:10:49,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 6.482758620689655) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:10:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2023-11-12 00:10:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-12 00:10:49,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:49,693 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:49,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:10:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:49,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-12 00:10:49,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2061301948, now seen corresponding path program 1 times [2023-11-12 00:10:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:49,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418096216] [2023-11-12 00:10:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:50,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:10:50,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418096216] [2023-11-12 00:10:50,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418096216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:10:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396542974] [2023-11-12 00:10:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:50,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:50,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:51,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cf14a6-0936-40ff-987e-651d5343e5e5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:10:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:10:51,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 00:10:51,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:10:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:51,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:10:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:10:52,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396542974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:10:52,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059511210] [2023-11-12 00:10:52,352 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-12 00:10:52,352 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:10:52,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:10:52,354 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:10:52,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:10:53,765 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:10:59,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5880#(and (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 2147483647) (= |ULTIMATE.start_main_~__tmp_5~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483648)) (<= 0 (+ ~__tmp_259_0~0 2147483648)) (<= 2147483647 |ULTIMATE.start_main_~main__tagbuf_len~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~4#1| 1) (= |ULTIMATE.start_main_~__tmp_17~0#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_3~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 2147483647) (= 2147483647 |ULTIMATE.start_main_~main____CPAchecker_TMP_5~0#1|) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_4~0#1| 2147483647) (= |ULTIMATE.start_main_~__tmp_6~0#1| 1) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~17#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1| 2147483646) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~16#1| 1) (= 2147483647 |ULTIMATE.start_main_~main__t~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 2147483648)) (= |ULTIMATE.start_main_~__tmp_18~0#1| 1) (<= ~__tmp_259_0~0 2147483647) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~5#1| 1))' at error location [2023-11-12 00:10:59,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:10:59,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:10:59,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2023-11-12 00:10:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132448039] [2023-11-12 00:10:59,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:10:59,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-12 00:10:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:10:59,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-12 00:10:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1402, Invalid=3428, Unknown=0, NotChecked=0, Total=4830 [2023-11-12 00:10:59,063 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 47 states, 46 states have (on average 7.065217391304348) internal successors, (325), 47 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)