./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:47:50,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:47:50,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:47:50,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:47:50,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:47:50,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:47:50,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:47:50,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:47:50,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:47:50,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:47:50,863 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:47:50,863 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:47:50,863 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:47:50,863 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:47:50,863 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:47:50,863 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:47:50,864 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:47:50,864 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:47:50,864 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:47:50,864 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:47:50,864 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:47:50,864 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:47:50,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:47:50,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:47:50,865 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:47:50,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:47:50,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:47:50,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:47:50,866 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:47:50,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:47:50,866 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:47:50,866 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:47:50,866 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:47:50,867 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:47:50,867 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:47:50,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:47:50,867 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:47:50,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:47:50,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:47:50,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:47:50,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:47:50,868 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:47:50,868 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:47:50,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:47:50,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:47:50,869 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:47:50,869 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:47:50,869 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E 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 ! call(reach_error())) ) 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 -> 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 [2024-11-14 05:47:51,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:47:51,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:47:51,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:47:51,187 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:47:51,187 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:47:51,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-acceleration/nested_1-2.c Unable to find full path for "g++" [2024-11-14 05:47:53,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:47:53,520 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:47:53,521 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2024-11-14 05:47:53,531 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/data/dc5f09ec6/9665fce938ea43dcb84ed08217a03da0/FLAGb057b7f3b [2024-11-14 05:47:53,547 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/data/dc5f09ec6/9665fce938ea43dcb84ed08217a03da0 [2024-11-14 05:47:53,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:47:53,552 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:47:53,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:47:53,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:47:53,559 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:47:53,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3117c1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53, skipping insertion in model container [2024-11-14 05:47:53,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,576 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:47:53,752 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2024-11-14 05:47:53,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:47:53,783 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:47:53,795 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2024-11-14 05:47:53,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:47:53,820 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:47:53,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53 WrapperNode [2024-11-14 05:47:53,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:47:53,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:47:53,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:47:53,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:47:53,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,862 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2024-11-14 05:47:53,863 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:47:53,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:47:53,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:47:53,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:47:53,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:47:53,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:47:53,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:47:53,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:47:53,893 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (1/1) ... [2024-11-14 05:47:53,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:47:53,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:53,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:47:53,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:47:53,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:47:53,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:47:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:47:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:47:54,056 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:47:54,058 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:47:54,178 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-14 05:47:54,179 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:47:54,238 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:47:54,238 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 05:47:54,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:47:54 BoogieIcfgContainer [2024-11-14 05:47:54,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:47:54,246 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:47:54,246 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:47:54,252 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:47:54,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:47:53" (1/3) ... [2024-11-14 05:47:54,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7113ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:47:54, skipping insertion in model container [2024-11-14 05:47:54,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:47:53" (2/3) ... [2024-11-14 05:47:54,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7113ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:47:54, skipping insertion in model container [2024-11-14 05:47:54,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:47:54" (3/3) ... [2024-11-14 05:47:54,255 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2024-11-14 05:47:54,275 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:47:54,278 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG nested_1-2.c that has 1 procedures, 8 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 05:47:54,351 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:47:54,368 INFO L333 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, 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;@725e7a52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:47:54,368 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:47:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2024-11-14 05:47:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 05:47:54,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:54,382 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 05:47:54,383 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:54,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2191049, now seen corresponding path program 1 times [2024-11-14 05:47:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703988161] [2024-11-14 05:47:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:54,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:54,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:54,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703988161] [2024-11-14 05:47:54,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703988161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:54,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:47:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820769565] [2024-11-14 05:47:54,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:54,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:47:54,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:54,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:47:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:47:54,721 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2024-11-14 05:47:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:54,753 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2024-11-14 05:47:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:47:54,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 [2024-11-14 05:47:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:54,763 INFO L225 Difference]: With dead ends: 15 [2024-11-14 05:47:54,764 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 05:47:54,767 INFO L431 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 [2024-11-14 05:47:54,770 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:54,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 05:47:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2024-11-14 05:47:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-14 05:47:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-11-14 05:47:54,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2024-11-14 05:47:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:54,806 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-11-14 05:47:54,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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) [2024-11-14 05:47:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2024-11-14 05:47:54,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 05:47:54,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:54,807 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 05:47:54,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:47:54,807 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:54,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2071920774, now seen corresponding path program 1 times [2024-11-14 05:47:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:54,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954557132] [2024-11-14 05:47:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:54,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:54,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954557132] [2024-11-14 05:47:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954557132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:47:54,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:47:54,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:47:54,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841026473] [2024-11-14 05:47:54,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:47:54,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:47:54,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:47:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:47:54,895 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-14 05:47:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:54,911 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2024-11-14 05:47:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:47:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2024-11-14 05:47:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:54,912 INFO L225 Difference]: With dead ends: 13 [2024-11-14 05:47:54,912 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 05:47:54,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:47:54,913 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:54,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 05:47:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-14 05:47:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2024-11-14 05:47:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-14 05:47:54,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-14 05:47:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:54,919 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-14 05:47:54,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-14 05:47:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-14 05:47:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:47:54,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:54,921 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:47:54,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:47:54,921 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:54,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash -219942828, now seen corresponding path program 1 times [2024-11-14 05:47:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:54,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073456532] [2024-11-14 05:47:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:55,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073456532] [2024-11-14 05:47:55,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073456532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484301886] [2024-11-14 05:47:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:55,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:55,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:55,150 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:55,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:47:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:55,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:47:55,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:47:55,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:47:55,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484301886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:55,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936208456] [2024-11-14 05:47:55,414 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:47:55,415 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:55,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:55,426 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:55,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:55,933 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:56,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(exists ((|v_ULTIMATE.start_main_~x~0#1_29| Int)) (and (<= 1 |v_ULTIMATE.start_main_~x~0#1_29|) (<= 1 |#StackHeapBarrier|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_29| 2) 0)) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_29| 4294967296))))' at error location [2024-11-14 05:47:56,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:56,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:56,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2024-11-14 05:47:56,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318106003] [2024-11-14 05:47:56,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:56,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:47:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:47:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:47:56,132 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2024-11-14 05:47:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:56,386 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2024-11-14 05:47:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:47:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 7 [2024-11-14 05:47:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:56,388 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:47:56,389 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 05:47:56,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:47:56,392 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:56,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:47:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 05:47:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 05:47:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2024-11-14 05:47:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-14 05:47:56,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 7 [2024-11-14 05:47:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:56,406 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-14 05:47:56,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2024-11-14 05:47:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-14 05:47:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:47:56,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:56,407 INFO L215 NwaCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1] [2024-11-14 05:47:56,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 05:47:56,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:56,608 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:56,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:56,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1260096067, now seen corresponding path program 2 times [2024-11-14 05:47:56,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:56,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026652598] [2024-11-14 05:47:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:56,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:47:56,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026652598] [2024-11-14 05:47:56,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026652598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77674960] [2024-11-14 05:47:56,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:47:56,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:56,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:56,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:47:56,972 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 05:47:56,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:47:56,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:47:56,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:47:57,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:47:57,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77674960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049598041] [2024-11-14 05:47:57,080 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:47:57,080 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:57,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:57,080 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:57,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:57,402 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:57,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '352#(exists ((|v_ULTIMATE.start_main_~x~0#1_34| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_34| 4294967296)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_34| 2) 0)) (<= 1 |v_ULTIMATE.start_main_~x~0#1_34|)))' at error location [2024-11-14 05:47:57,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:57,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:57,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-14 05:47:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49327317] [2024-11-14 05:47:57,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:57,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:47:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:47:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:47:57,583 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-11-14 05:47:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:47:57,687 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-14 05:47:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:47:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 20 [2024-11-14 05:47:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:47:57,688 INFO L225 Difference]: With dead ends: 53 [2024-11-14 05:47:57,688 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 05:47:57,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:47:57,689 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:47:57,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:47:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 05:47:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-14 05:47:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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) [2024-11-14 05:47:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-14 05:47:57,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 20 [2024-11-14 05:47:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:47:57,707 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-14 05:47:57,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-11-14 05:47:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-14 05:47:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 05:47:57,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:47:57,709 INFO L215 NwaCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1, 1] [2024-11-14 05:47:57,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:47:57,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:57,913 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:47:57,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:47:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash 524311741, now seen corresponding path program 3 times [2024-11-14 05:47:57,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:47:57,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154011086] [2024-11-14 05:47:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:47:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:47:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:47:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-14 05:47:58,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:47:58,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154011086] [2024-11-14 05:47:58,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154011086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:47:58,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094957549] [2024-11-14 05:47:58,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:47:58,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:47:58,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:47:58,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:47:58,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:47:58,378 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:47:58,379 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:47:58,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:47:58,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:47:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 05:47:58,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:47:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 10 proven. 314 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 05:47:59,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094957549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:47:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958407428] [2024-11-14 05:47:59,160 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:47:59,161 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:47:59,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:47:59,161 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:47:59,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:47:59,360 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:47:59,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '768#(exists ((|v_ULTIMATE.start_main_~x~0#1_47| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_47| 4294967296)) (<= 1 |v_ULTIMATE.start_main_~x~0#1_47|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_47| 2) 0))))' at error location [2024-11-14 05:47:59,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:47:59,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:47:59,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2024-11-14 05:47:59,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284813341] [2024-11-14 05:47:59,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:47:59,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 05:47:59,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:47:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 05:47:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:47:59,671 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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) [2024-11-14 05:48:08,166 WARN L286 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 36 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:48:20,420 WARN L286 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 40 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:48:38,715 WARN L286 SmtUtils]: Spent 18.10s on a formula simplification. DAG size of input: 43 DAG size of output: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:48:45,347 WARN L286 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 33 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:48:57,633 WARN L286 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 37 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:49:15,868 WARN L286 SmtUtils]: Spent 18.12s on a formula simplification. DAG size of input: 40 DAG size of output: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:49:22,435 WARN L286 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 30 DAG size of output: 31 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:49:34,555 WARN L286 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 34 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:49:52,771 WARN L286 SmtUtils]: Spent 18.08s on a formula simplification. DAG size of input: 37 DAG size of output: 38 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:49:59,175 WARN L286 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 26 DAG size of output: 27 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:50:11,279 WARN L286 SmtUtils]: Spent 12.05s on a formula simplification. DAG size of input: 31 DAG size of output: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:50:27,427 WARN L286 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 34 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:50:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:27,440 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2024-11-14 05:50:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-14 05:50:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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 36 [2024-11-14 05:50:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:27,443 INFO L225 Difference]: With dead ends: 135 [2024-11-14 05:50:27,443 INFO L226 Difference]: Without dead ends: 107 [2024-11-14 05:50:27,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 147.9s TimeCoverageRelationStatistics Valid=2639, Invalid=11167, Unknown=0, NotChecked=0, Total=13806 [2024-11-14 05:50:27,450 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:27,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:50:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-14 05:50:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-14 05:50:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 106 states have internal predecessors, (129), 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) [2024-11-14 05:50:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2024-11-14 05:50:27,478 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 36 [2024-11-14 05:50:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:27,478 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2024-11-14 05:50:27,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 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) [2024-11-14 05:50:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2024-11-14 05:50:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-14 05:50:27,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:27,481 INFO L215 NwaCegarLoop]: trace histogram [70, 10, 10, 1, 1, 1, 1] [2024-11-14 05:50:27,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:50:27,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:27,686 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:27,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:27,686 INFO L85 PathProgramCache]: Analyzing trace with hash -269863767, now seen corresponding path program 4 times [2024-11-14 05:50:27,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:27,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687508513] [2024-11-14 05:50:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:27,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2024-11-14 05:50:28,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687508513] [2024-11-14 05:50:28,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687508513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11255754] [2024-11-14 05:50:28,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:50:28,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:28,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:28,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:28,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:50:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:28,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:50:28,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 0 proven. 2935 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-11-14 05:50:28,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 0 proven. 1630 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-11-14 05:50:29,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11255754] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:29,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125948705] [2024-11-14 05:50:29,130 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:50:29,130 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:29,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:29,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:29,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:29,273 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:29,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1998#(exists ((|v_ULTIMATE.start_main_~x~0#1_72| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |v_ULTIMATE.start_main_~x~0#1_72|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_72| 2) 0)) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_72| 4294967296))))' at error location [2024-11-14 05:50:29,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:29,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 4] total 25 [2024-11-14 05:50:29,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628873713] [2024-11-14 05:50:29,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:29,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 05:50:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 05:50:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:50:29,609 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 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) [2024-11-14 05:50:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:33,144 INFO L93 Difference]: Finished difference Result 436 states and 566 transitions. [2024-11-14 05:50:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2024-11-14 05:50:33,144 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 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 94 [2024-11-14 05:50:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:33,147 INFO L225 Difference]: With dead ends: 436 [2024-11-14 05:50:33,147 INFO L226 Difference]: Without dead ends: 338 [2024-11-14 05:50:33,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5703 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=929, Invalid=16627, Unknown=0, NotChecked=0, Total=17556 [2024-11-14 05:50:33,151 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:33,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 05:50:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-14 05:50:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 123. [2024-11-14 05:50:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 122 states have internal predecessors, (142), 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) [2024-11-14 05:50:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2024-11-14 05:50:33,205 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 94 [2024-11-14 05:50:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:33,205 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2024-11-14 05:50:33,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 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) [2024-11-14 05:50:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2024-11-14 05:50:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 05:50:33,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:33,208 INFO L215 NwaCegarLoop]: trace histogram [88, 11, 11, 1, 1, 1, 1] [2024-11-14 05:50:33,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:50:33,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 05:50:33,409 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:33,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -307001048, now seen corresponding path program 5 times [2024-11-14 05:50:33,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:33,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251664751] [2024-11-14 05:50:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:33,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 821 proven. 36 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2024-11-14 05:50:33,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:33,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251664751] [2024-11-14 05:50:33,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251664751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:33,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930371719] [2024-11-14 05:50:33,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:50:33,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:33,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:33,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:33,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:50:34,063 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 05:50:34,063 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:50:34,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 05:50:34,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 821 proven. 36 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2024-11-14 05:50:34,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 821 proven. 36 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2024-11-14 05:50:34,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930371719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:34,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827605601] [2024-11-14 05:50:34,329 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:50:34,329 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:34,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:34,330 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:34,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:34,455 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:34,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4015#(exists ((|v_ULTIMATE.start_main_~x~0#1_77| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1_77|) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_77| 4294967296)) (<= 1 |#StackHeapBarrier|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_77| 2) 0))))' at error location [2024-11-14 05:50:34,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:34,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:34,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-14 05:50:34,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642946026] [2024-11-14 05:50:34,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:34,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:50:34,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:34,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:50:34,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:50:34,644 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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) [2024-11-14 05:50:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:34,760 INFO L93 Difference]: Finished difference Result 249 states and 300 transitions. [2024-11-14 05:50:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:50:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 114 [2024-11-14 05:50:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:34,761 INFO L225 Difference]: With dead ends: 249 [2024-11-14 05:50:34,761 INFO L226 Difference]: Without dead ends: 137 [2024-11-14 05:50:34,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:50:34,763 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:34,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:50:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-14 05:50:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-14 05:50:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.088235294117647) internal successors, (148), 136 states have internal predecessors, (148), 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) [2024-11-14 05:50:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2024-11-14 05:50:34,812 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 114 [2024-11-14 05:50:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:34,812 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2024-11-14 05:50:34,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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) [2024-11-14 05:50:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2024-11-14 05:50:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 05:50:34,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:34,818 INFO L215 NwaCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1, 1] [2024-11-14 05:50:34,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:50:35,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 05:50:35,019 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:35,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:35,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1558312536, now seen corresponding path program 6 times [2024-11-14 05:50:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:35,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013193710] [2024-11-14 05:50:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:35,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-11-14 05:50:35,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:35,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013193710] [2024-11-14 05:50:35,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013193710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:35,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579316559] [2024-11-14 05:50:35,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:50:35,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:35,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:35,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:35,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:50:35,964 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:50:35,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:50:35,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 05:50:35,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-11-14 05:50:36,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-11-14 05:50:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579316559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663365536] [2024-11-14 05:50:37,083 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:50:37,083 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:37,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:37,083 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:37,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:37,221 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:37,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5617#(exists ((|v_ULTIMATE.start_main_~x~0#1_104| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_104| 4294967296)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_104| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_104|)))' at error location [2024-11-14 05:50:37,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:37,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-14 05:50:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715438661] [2024-11-14 05:50:37,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:37,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:50:37,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:50:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2024-11-14 05:50:37,438 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 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) [2024-11-14 05:50:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:50:42,633 INFO L93 Difference]: Finished difference Result 626 states and 691 transitions. [2024-11-14 05:50:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:50:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 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 136 [2024-11-14 05:50:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:50:42,637 INFO L225 Difference]: With dead ends: 626 [2024-11-14 05:50:42,638 INFO L226 Difference]: Without dead ends: 623 [2024-11-14 05:50:42,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=528, Invalid=1194, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:50:42,639 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:50:42,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 182 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:50:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2024-11-14 05:50:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 305. [2024-11-14 05:50:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.0855263157894737) internal successors, (330), 304 states have internal predecessors, (330), 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) [2024-11-14 05:50:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 330 transitions. [2024-11-14 05:50:42,738 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 330 transitions. Word has length 136 [2024-11-14 05:50:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:50:42,739 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 330 transitions. [2024-11-14 05:50:42,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 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) [2024-11-14 05:50:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 330 transitions. [2024-11-14 05:50:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2024-11-14 05:50:42,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:50:42,744 INFO L215 NwaCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1, 1] [2024-11-14 05:50:42,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:50:42,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:42,949 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:50:42,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:50:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2078317826, now seen corresponding path program 7 times [2024-11-14 05:50:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:50:42,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838179680] [2024-11-14 05:50:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:50:42,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:50:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2024-11-14 05:50:45,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:50:45,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838179680] [2024-11-14 05:50:45,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838179680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:50:45,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821600581] [2024-11-14 05:50:45,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:50:45,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:50:45,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:50:45,712 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:50:45,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:50:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:50:46,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 05:50:46,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:50:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2024-11-14 05:50:46,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:50:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2024-11-14 05:50:49,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821600581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:50:49,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753791865] [2024-11-14 05:50:49,402 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:50:49,402 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:50:49,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:50:49,402 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:50:49,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:50:49,532 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:50:50,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9367#(exists ((|v_ULTIMATE.start_main_~x~0#1_159| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |v_ULTIMATE.start_main_~x~0#1_159|) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_159| 4294967296)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_159| 2) 0))))' at error location [2024-11-14 05:50:50,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:50:50,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:50:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2024-11-14 05:50:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736199908] [2024-11-14 05:50:50,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:50:50,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-14 05:50:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:50:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-14 05:50:50,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=2575, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 05:50:50,067 INFO L87 Difference]: Start difference. First operand 305 states and 330 transitions. Second operand has 55 states, 55 states have (on average 2.8727272727272726) internal successors, (158), 54 states have internal predecessors, (158), 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) [2024-11-14 05:50:58,008 WARN L286 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 106 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:53:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:53:32,323 INFO L93 Difference]: Finished difference Result 1228 states and 1356 transitions. [2024-11-14 05:53:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 05:53:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.8727272727272726) internal successors, (158), 54 states have internal predecessors, (158), 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 304 [2024-11-14 05:53:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:53:32,330 INFO L225 Difference]: With dead ends: 1228 [2024-11-14 05:53:32,331 INFO L226 Difference]: Without dead ends: 1225 [2024-11-14 05:53:32,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 163.8s TimeCoverageRelationStatistics Valid=2210, Invalid=4750, Unknown=12, NotChecked=0, Total=6972 [2024-11-14 05:53:32,333 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:53:32,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 767 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:53:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-11-14 05:53:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 641. [2024-11-14 05:53:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 1.084375) internal successors, (694), 640 states have internal predecessors, (694), 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) [2024-11-14 05:53:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 694 transitions. [2024-11-14 05:53:32,568 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 694 transitions. Word has length 304 [2024-11-14 05:53:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:53:32,569 INFO L471 AbstractCegarLoop]: Abstraction has 641 states and 694 transitions. [2024-11-14 05:53:32,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.8727272727272726) internal successors, (158), 54 states have internal predecessors, (158), 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) [2024-11-14 05:53:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 694 transitions. [2024-11-14 05:53:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2024-11-14 05:53:32,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:53:32,585 INFO L215 NwaCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1, 1] [2024-11-14 05:53:32,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:53:32,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 05:53:32,786 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:53:32,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:53:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -290829398, now seen corresponding path program 8 times [2024-11-14 05:53:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:53:32,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934506633] [2024-11-14 05:53:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:53:32,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:53:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:53:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2024-11-14 05:53:40,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:53:40,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934506633] [2024-11-14 05:53:40,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934506633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:53:40,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456766278] [2024-11-14 05:53:40,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:53:40,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:53:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:53:40,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:53:40,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e062afdf-79db-4807-a8ce-bd7a5853c822/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:53:52,185 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 314 check-sat command(s) [2024-11-14 05:53:52,186 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:53:52,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-14 05:53:52,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:53:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2024-11-14 05:53:53,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:54:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2024-11-14 05:54:00,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456766278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:54:00,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [827162758] [2024-11-14 05:54:00,426 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 05:54:00,427 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:54:00,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:54:00,427 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:54:00,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:54:00,513 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:54:01,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17093#(exists ((|v_ULTIMATE.start_main_~x~0#1_270| Int)) (and (<= 1 |#StackHeapBarrier|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_270| 2) 0)) (<= 268435455 (mod |v_ULTIMATE.start_main_~x~0#1_270| 4294967296)) (<= 1 |v_ULTIMATE.start_main_~x~0#1_270|)))' at error location [2024-11-14 05:54:01,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:54:01,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:54:01,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 110 [2024-11-14 05:54:01,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209344455] [2024-11-14 05:54:01,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:54:01,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-11-14 05:54:01,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:54:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-11-14 05:54:01,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3255, Invalid=9855, Unknown=0, NotChecked=0, Total=13110 [2024-11-14 05:54:01,185 INFO L87 Difference]: Start difference. First operand 641 states and 694 transitions. Second operand has 111 states, 111 states have (on average 2.936936936936937) internal successors, (326), 110 states have internal predecessors, (326), 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) [2024-11-14 05:54:35,753 WARN L286 SmtUtils]: Spent 30.77s on a formula simplification. DAG size of input: 218 DAG size of output: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:55:11,157 WARN L286 SmtUtils]: Spent 32.68s on a formula simplification. DAG size of input: 214 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:55:42,902 WARN L286 SmtUtils]: Spent 27.03s on a formula simplification. DAG size of input: 210 DAG size of output: 22 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:56:12,530 WARN L286 SmtUtils]: Spent 22.64s on a formula simplification. DAG size of input: 206 DAG size of output: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:56:45,872 WARN L286 SmtUtils]: Spent 23.98s on a formula simplification. DAG size of input: 202 DAG size of output: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:57:32,721 WARN L286 SmtUtils]: Spent 35.20s on a formula simplification. DAG size of input: 198 DAG size of output: 42 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:58:11,442 WARN L286 SmtUtils]: Spent 25.58s on a formula simplification. DAG size of input: 194 DAG size of output: 34 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:58:51,312 WARN L286 SmtUtils]: Spent 24.22s on a formula simplification. DAG size of input: 190 DAG size of output: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:59:32,033 WARN L286 SmtUtils]: Spent 22.98s on a formula simplification. DAG size of input: 186 DAG size of output: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 06:00:10,348 WARN L286 SmtUtils]: Spent 18.80s on a formula simplification. DAG size of input: 182 DAG size of output: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 06:00:52,308 WARN L286 SmtUtils]: Spent 20.64s on a formula simplification. DAG size of input: 178 DAG size of output: 18 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 06:01:30,905 WARN L286 SmtUtils]: Spent 15.23s on a formula simplification. DAG size of input: 174 DAG size of output: 14 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 06:02:17,688 WARN L286 SmtUtils]: Spent 21.09s on a formula simplification. DAG size of input: 170 DAG size of output: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 06:02:59,423 WARN L286 SmtUtils]: Spent 13.75s on a formula simplification. DAG size of input: 166 DAG size of output: 14 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)