./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array26_pattern.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_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/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_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array26_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/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_47a92563-d640-411b-a549-d1ad30647fe5/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 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:11:02,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:11:02,618 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:11:02,627 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:11:02,627 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:11:02,664 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:11:02,665 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:11:02,665 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:11:02,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:11:02,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:11:02,667 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:11:02,667 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:11:02,667 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:11:02,667 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:11:02,668 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:11:02,668 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:11:02,668 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:11:02,668 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:11:02,668 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:11:02,669 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:11:02,669 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:11:02,669 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:11:02,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:11:02,670 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:11:02,670 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:11:02,670 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:11:02,670 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:11:02,670 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:11:02,670 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:11:02,670 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:11:02,671 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:11:02,671 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:11:02,671 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:11:02,671 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:11:02,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:11:02,673 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:11:02,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:11:02,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:11:02,674 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:11:02,674 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:11:02,674 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_47a92563-d640-411b-a549-d1ad30647fe5/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 -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2024-11-14 05:11:02,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:11:02,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:11:02,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:11:02,984 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:11:02,985 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:11:02,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-patterns/array26_pattern.c Unable to find full path for "g++" [2024-11-14 05:11:05,091 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:11:05,406 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:11:05,407 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/sv-benchmarks/c/array-patterns/array26_pattern.c [2024-11-14 05:11:05,425 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/data/0c7bba785/436eefea28e444eb9c49b63df2c53007/FLAGd281ca1db [2024-11-14 05:11:05,674 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/data/0c7bba785/436eefea28e444eb9c49b63df2c53007 [2024-11-14 05:11:05,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:11:05,679 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:11:05,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:11:05,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:11:05,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:11:05,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3093b329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05, skipping insertion in model container [2024-11-14 05:11:05,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,708 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:11:05,843 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_47a92563-d640-411b-a549-d1ad30647fe5/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2024-11-14 05:11:05,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:11:05,874 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:11:05,886 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_47a92563-d640-411b-a549-d1ad30647fe5/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2024-11-14 05:11:05,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:11:05,908 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:11:05,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05 WrapperNode [2024-11-14 05:11:05,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:11:05,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:11:05,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:11:05,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:11:05,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,939 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2024-11-14 05:11:05,940 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:11:05,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:11:05,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:11:05,941 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:11:05,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,950 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,950 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,955 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,959 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:11:05,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:11:05,963 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:11:05,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:11:05,964 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (1/1) ... [2024-11-14 05:11:05,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:11:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:11:05,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:11:05,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:11:06,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:11:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:11:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 05:11:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 05:11:06,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:11:06,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:11:06,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 05:11:06,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:11:06,112 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:11:06,114 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:11:06,286 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-14 05:11:06,286 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:11:06,377 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:11:06,377 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 05:11:06,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:11:06 BoogieIcfgContainer [2024-11-14 05:11:06,378 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:11:06,380 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:11:06,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:11:06,389 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:11:06,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:11:05" (1/3) ... [2024-11-14 05:11:06,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0aea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:11:06, skipping insertion in model container [2024-11-14 05:11:06,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:11:05" (2/3) ... [2024-11-14 05:11:06,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0aea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:11:06, skipping insertion in model container [2024-11-14 05:11:06,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:11:06" (3/3) ... [2024-11-14 05:11:06,394 INFO L112 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2024-11-14 05:11:06,411 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:11:06,414 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array26_pattern.c that has 1 procedures, 10 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-14 05:11:06,472 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:11:06,489 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;@115a12e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:11:06,490 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:11:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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 05:11:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 05:11:06,501 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:06,502 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 05:11:06,502 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:11:06,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash 124586346, now seen corresponding path program 1 times [2024-11-14 05:11:06,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:06,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302310166] [2024-11-14 05:11:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:06,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:06,815 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 05:11:06,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:11:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302310166] [2024-11-14 05:11:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302310166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:11:06,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:11:06,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:11:06,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076492523] [2024-11-14 05:11:06,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:11:06,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:11:06,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:11:06,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:11:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:11:06,855 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 05:11:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:11:06,930 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2024-11-14 05:11:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:11:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2024-11-14 05:11:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:11:06,947 INFO L225 Difference]: With dead ends: 19 [2024-11-14 05:11:06,947 INFO L226 Difference]: Without dead ends: 10 [2024-11-14 05:11:06,952 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 05:11:06,956 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:11:06,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:11:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-14 05:11:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2024-11-14 05:11:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 05:11:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2024-11-14 05:11:06,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2024-11-14 05:11:06,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:11:06,990 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2024-11-14 05:11:06,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 05:11:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2024-11-14 05:11:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:11:06,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:06,991 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:11:06,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:11:06,992 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:11:06,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:06,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1757939410, now seen corresponding path program 1 times [2024-11-14 05:11:06,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:06,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725316644] [2024-11-14 05:11:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:06,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:07,169 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 05:11:07,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:11:07,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725316644] [2024-11-14 05:11:07,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725316644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:11:07,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:11:07,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:11:07,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691231725] [2024-11-14 05:11:07,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:11:07,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:11:07,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:11:07,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:11:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:11:07,173 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 05:11:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:11:07,226 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2024-11-14 05:11:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:11:07,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 05:11:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:11:07,227 INFO L225 Difference]: With dead ends: 18 [2024-11-14 05:11:07,227 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 05:11:07,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:11:07,228 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:11:07,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:11:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 05:11:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-14 05:11:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 05:11:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-11-14 05:11:07,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2024-11-14 05:11:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:11:07,236 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-11-14 05:11:07,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 05:11:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2024-11-14 05:11:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 05:11:07,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:07,236 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:11:07,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:11:07,237 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:11:07,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:07,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1079044630, now seen corresponding path program 1 times [2024-11-14 05:11:07,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:07,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428811579] [2024-11-14 05:11:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:07,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:11:07,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:11:07,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428811579] [2024-11-14 05:11:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428811579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:11:07,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:11:07,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:11:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643087513] [2024-11-14 05:11:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:11:07,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:11:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:11:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:11:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:11:07,366 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 05:11:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:11:07,410 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2024-11-14 05:11:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:11:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) Word has length 8 [2024-11-14 05:11:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:11:07,411 INFO L225 Difference]: With dead ends: 19 [2024-11-14 05:11:07,411 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 05:11:07,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:11:07,412 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:11:07,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:11:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 05:11:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2024-11-14 05:11:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 05:11:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2024-11-14 05:11:07,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2024-11-14 05:11:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:11:07,417 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2024-11-14 05:11:07,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 05:11:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2024-11-14 05:11:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 05:11:07,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:07,418 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:11:07,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:11:07,418 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:11:07,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash 914227547, now seen corresponding path program 1 times [2024-11-14 05:11:07,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:07,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833130974] [2024-11-14 05:11:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:07,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:11:07,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:11:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833130974] [2024-11-14 05:11:07,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833130974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:11:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893491707] [2024-11-14 05:11:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:07,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:11:07,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:11:07,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:11:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:07,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:11:07,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:11:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:11:07,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:11:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:11:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893491707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:11:07,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1044067191] [2024-11-14 05:11:07,872 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:11:07,872 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:11:07,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:11:07,877 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:11:07,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:11:10,051 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:11:10,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165#true' at error location [2024-11-14 05:11:10,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:11:10,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:11:10,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-14 05:11:10,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564839819] [2024-11-14 05:11:10,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:11:10,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:11:10,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:11:10,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:11:10,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:11:10,399 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 05:11:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:11:10,451 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2024-11-14 05:11:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:11:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 11 [2024-11-14 05:11:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:11:10,453 INFO L225 Difference]: With dead ends: 24 [2024-11-14 05:11:10,453 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 05:11:10,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:11:10,454 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:11:10,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:11:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 05:11:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-14 05:11:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 05:11:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-14 05:11:10,458 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2024-11-14 05:11:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:11:10,458 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-14 05:11:10,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 05:11:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-14 05:11:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 05:11:10,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:10,459 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:11:10,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:11:10,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:10,660 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:11:10,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash 983501290, now seen corresponding path program 2 times [2024-11-14 05:11:10,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:10,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480555742] [2024-11-14 05:11:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:10,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:11:10,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:11:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480555742] [2024-11-14 05:11:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480555742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:11:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525517755] [2024-11-14 05:11:10,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:11:10,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:10,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:11:10,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:11:10,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:11:10,894 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:11:10,895 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:11:10,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:11:10,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:11:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:11:10,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:11:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 05:11:10,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525517755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:11:10,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339849387] [2024-11-14 05:11:10,969 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:11:10,969 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:11:10,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:11:10,970 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:11:10,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:11:12,006 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:11:12,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '380#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 05:11:12,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:11:12,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:11:12,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 05:11:12,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902688978] [2024-11-14 05:11:12,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:11:12,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:11:12,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:11:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:11:12,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:11:12,612 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 05:11:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:11:12,666 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-11-14 05:11:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:11:12,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 13 [2024-11-14 05:11:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:11:12,667 INFO L225 Difference]: With dead ends: 29 [2024-11-14 05:11:12,667 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 05:11:12,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:11:12,668 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:11:12,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:11:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 05:11:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-11-14 05:11:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 05:11:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-14 05:11:12,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2024-11-14 05:11:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:11:12,674 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-14 05:11:12,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 05:11:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-14 05:11:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 05:11:12,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:12,675 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:11:12,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:11:12,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:12,879 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:11:12,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1714879918, now seen corresponding path program 3 times [2024-11-14 05:11:12,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:12,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371371351] [2024-11-14 05:11:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:12,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:11:13,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:11:13,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371371351] [2024-11-14 05:11:13,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371371351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:11:13,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367342067] [2024-11-14 05:11:13,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:11:13,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:13,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:11:13,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:11:13,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:11:13,157 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:11:13,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:11:13,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:11:13,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:11:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 05:11:13,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:11:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 05:11:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367342067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:11:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374456868] [2024-11-14 05:11:13,309 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:11:13,311 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:11:13,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:11:13,312 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:11:13,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:11:14,285 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:11:14,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '469#true' at error location [2024-11-14 05:11:14,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:11:14,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:11:14,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2024-11-14 05:11:14,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295130402] [2024-11-14 05:11:14,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:11:14,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:11:14,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:11:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:11:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:11:14,577 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:11:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:11:14,741 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-14 05:11:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:11:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 05:11:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:11:14,743 INFO L225 Difference]: With dead ends: 31 [2024-11-14 05:11:14,743 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 05:11:14,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:11:14,744 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:11:14,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:11:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 05:11:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2024-11-14 05:11:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 05:11:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-11-14 05:11:14,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2024-11-14 05:11:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:11:14,750 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-11-14 05:11:14,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:11:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-11-14 05:11:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 05:11:14,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:11:14,751 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 05:11:14,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:11:14,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:14,955 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:11:14,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:11:14,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1065491862, now seen corresponding path program 4 times [2024-11-14 05:11:14,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:11:14,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263412943] [2024-11-14 05:11:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:11:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:11:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:11:15,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309434975] [2024-11-14 05:11:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:11:15,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:11:15,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:11:15,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:11:15,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:11:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:11:15,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-14 05:11:15,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:11:15,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:11:15,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:11:15,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:11:15,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-14 05:11:15,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:11:15,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 40 [2024-11-14 05:11:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:11:16,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:11:25,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:11:25,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 51 [2024-11-14 05:11:48,488 WARN L286 SmtUtils]: Spent 15.30s on a formula simplification. DAG size of input: 43 DAG size of output: 41 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:11:58,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:11:58,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 126 [2024-11-14 05:11:58,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:11:58,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-14 05:11:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:12:01,314 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (= 0 (+ (* |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0) |ULTIMATE.start_main_~column~0#1|)) [2024-11-14 05:12:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:12:01,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:12:01,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 487239 treesize of output 421737 [2024-11-14 05:13:56,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 491 treesize of output 473 [2024-11-14 05:13:56,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:13:56,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 446493 treesize of output 407654 [2024-11-14 05:17:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:35,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263412943] [2024-11-14 05:17:35,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:17:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309434975] [2024-11-14 05:17:35,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309434975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783176104] [2024-11-14 05:17:35,004 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:17:35,005 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:35,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:35,005 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:35,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:35,604 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:36,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '685#true' at error location [2024-11-14 05:17:36,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:36,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:17:36,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2024-11-14 05:17:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641095913] [2024-11-14 05:17:36,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:36,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 05:17:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 05:17:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:17:36,397 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 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 05:17:45,602 WARN L286 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 50 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:17:47,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:17:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:51,253 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2024-11-14 05:17:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 05:17:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 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 21 [2024-11-14 05:17:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:51,255 INFO L225 Difference]: With dead ends: 64 [2024-11-14 05:17:51,255 INFO L226 Difference]: Without dead ends: 61 [2024-11-14 05:17:51,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=309, Invalid=2342, Unknown=1, NotChecked=0, Total=2652 [2024-11-14 05:17:51,257 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:51,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-14 05:17:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-14 05:17:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2024-11-14 05:17:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 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 05:17:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-11-14 05:17:51,276 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 21 [2024-11-14 05:17:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:51,276 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-11-14 05:17:51,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 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 05:17:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-11-14 05:17:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:17:51,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:51,277 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 05:17:51,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:17:51,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:51,478 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:51,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1091524734, now seen corresponding path program 5 times [2024-11-14 05:17:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:51,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417127253] [2024-11-14 05:17:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:51,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:17:51,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:51,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417127253] [2024-11-14 05:17:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417127253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110654580] [2024-11-14 05:17:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:17:51,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:51,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:51,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:17:51,941 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 05:17:51,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:51,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:17:51,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:17:52,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:17:52,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110654580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:52,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953640502] [2024-11-14 05:17:52,105 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:17:52,105 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:52,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:52,106 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:52,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:52,671 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:52,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1074#true' at error location [2024-11-14 05:17:52,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:52,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:52,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 05:17:52,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746400605] [2024-11-14 05:17:52,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:52,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:17:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:17:52,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:17:52,963 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 05:17:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:53,179 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2024-11-14 05:17:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:17:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 22 [2024-11-14 05:17:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:53,180 INFO L225 Difference]: With dead ends: 87 [2024-11-14 05:17:53,180 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 05:17:53,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:17:53,181 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:53,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:17:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 05:17:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2024-11-14 05:17:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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 05:17:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-11-14 05:17:53,201 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 22 [2024-11-14 05:17:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:53,201 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-11-14 05:17:53,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 05:17:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-11-14 05:17:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:17:53,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:53,202 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 05:17:53,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:17:53,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:53,403 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:53,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1300015827, now seen corresponding path program 6 times [2024-11-14 05:17:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:53,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242996693] [2024-11-14 05:17:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:17:53,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:53,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242996693] [2024-11-14 05:17:53,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242996693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:53,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186453763] [2024-11-14 05:17:53,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:17:53,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:53,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:53,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:17:53,681 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:17:53,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:53,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:17:53,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:17:53,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:17:53,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186453763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:53,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950430841] [2024-11-14 05:17:53,860 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:17:53,860 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:53,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:53,861 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:53,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:54,571 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:54,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1487#true' at error location [2024-11-14 05:17:54,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:54,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:54,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 05:17:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314503937] [2024-11-14 05:17:54,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:54,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 05:17:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 05:17:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:17:54,872 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 05:17:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:55,006 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2024-11-14 05:17:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:17:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 22 [2024-11-14 05:17:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:55,013 INFO L225 Difference]: With dead ends: 74 [2024-11-14 05:17:55,013 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 05:17:55,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:17:55,014 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:55,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:17:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 05:17:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2024-11-14 05:17:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 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 05:17:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2024-11-14 05:17:55,033 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 22 [2024-11-14 05:17:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:55,034 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2024-11-14 05:17:55,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 05:17:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2024-11-14 05:17:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 05:17:55,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:55,035 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 05:17:55,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:17:55,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:55,235 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:55,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1827068918, now seen corresponding path program 7 times [2024-11-14 05:17:55,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:55,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510860287] [2024-11-14 05:17:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:55,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 05:17:55,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:55,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510860287] [2024-11-14 05:17:55,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510860287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:55,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296949382] [2024-11-14 05:17:55,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:17:55,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:55,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:55,490 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:55,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:17:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:55,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:17:55,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 05:17:55,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 05:17:55,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296949382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [673916644] [2024-11-14 05:17:55,798 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:17:55,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:55,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:55,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:55,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:56,448 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:56,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1864#true' at error location [2024-11-14 05:17:56,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:56,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:56,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-14 05:17:56,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290785873] [2024-11-14 05:17:56,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:56,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:17:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:17:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-11-14 05:17:56,741 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 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 05:17:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:57,052 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2024-11-14 05:17:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:17:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 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 25 [2024-11-14 05:17:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:57,053 INFO L225 Difference]: With dead ends: 85 [2024-11-14 05:17:57,053 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 05:17:57,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:17:57,054 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:57,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:17:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 05:17:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2024-11-14 05:17:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 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 05:17:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-14 05:17:57,081 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 25 [2024-11-14 05:17:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:57,081 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-14 05:17:57,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 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 05:17:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-14 05:17:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 05:17:57,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:57,082 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 05:17:57,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:17:57,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:57,287 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:57,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1845293778, now seen corresponding path program 8 times [2024-11-14 05:17:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:57,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608650559] [2024-11-14 05:17:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:17:57,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608650559] [2024-11-14 05:17:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608650559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137212132] [2024-11-14 05:17:57,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:17:57,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:57,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:57,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:17:57,822 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:17:57,822 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:57,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:17:57,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:17:57,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:17:58,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137212132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:58,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566756387] [2024-11-14 05:17:58,052 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:17:58,052 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:58,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:58,052 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:58,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:58,648 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:58,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2320#true' at error location [2024-11-14 05:17:58,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:58,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:58,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-11-14 05:17:58,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584013380] [2024-11-14 05:17:58,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:58,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 05:17:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 05:17:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:17:58,944 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 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 05:17:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:59,447 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2024-11-14 05:17:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:17:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 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 25 [2024-11-14 05:17:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:59,449 INFO L225 Difference]: With dead ends: 70 [2024-11-14 05:17:59,449 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 05:17:59,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:17:59,450 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:59,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 14 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:17:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 05:17:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-11-14 05:17:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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 05:17:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-14 05:17:59,478 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2024-11-14 05:17:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:59,478 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-14 05:17:59,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 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 05:17:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-14 05:17:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 05:17:59,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:59,479 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-14 05:17:59,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:17:59,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 05:17:59,683 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:59,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2048787099, now seen corresponding path program 9 times [2024-11-14 05:17:59,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:59,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522578077] [2024-11-14 05:17:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:17:59,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506374865] [2024-11-14 05:17:59,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:17:59,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:59,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:59,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:59,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:18:04,800 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:18:04,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:04,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-14 05:18:04,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:04,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:18:04,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 05:18:04,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:04,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2024-11-14 05:18:05,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:05,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2024-11-14 05:18:05,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:05,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2024-11-14 05:18:05,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:05,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 70 [2024-11-14 05:18:05,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:05,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 84 [2024-11-14 05:18:05,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:05,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 96 [2024-11-14 05:18:05,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:18:05,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 108 [2024-11-14 05:18:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:07,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:10,195 INFO L349 Elim1Store]: treesize reduction 42, result has 78.9 percent of original size [2024-11-14 05:18:10,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 183 [2024-11-14 05:18:27,856 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 05:19:07,967 WARN L286 SmtUtils]: Spent 34.77s on a formula simplification. DAG size of input: 55 DAG size of output: 53 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:19:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,380 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,381 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,382 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,383 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,383 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,384 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,385 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,386 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:14,391 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-14 05:19:30,358 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:30,938 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:19:45,484 WARN L286 SmtUtils]: Spent 14.00s on a formula simplification. DAG size of input: 90 DAG size of output: 75 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-14 05:19:45,484 INFO L349 Elim1Store]: treesize reduction 42, result has 78.9 percent of original size [2024-11-14 05:19:45,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 12570427 treesize of output 7983063 [2024-11-14 05:20:20,497 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:20,686 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:20,837 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:20,898 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:21,394 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 05:20:26,089 INFO L224 Elim1Store]: Index analysis took 281 ms [2024-11-14 05:20:34,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:34,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522578077] [2024-11-14 05:20:34,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:20:34,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506374865] [2024-11-14 05:20:34,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 474547 column 7: push canceled [2024-11-14 05:20:34,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703876365] [2024-11-14 05:20:34,771 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:20:34,771 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:34,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:34,771 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:34,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:41,263 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:19,008 WARN L286 SmtUtils]: Spent 22.17s on a formula simplification. DAG size of input: 76 DAG size of output: 73 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:21:46,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2724#true' at error location [2024-11-14 05:21:46,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:46,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:21:46,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2024-11-14 05:21:46,330 ERROR L171 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2024-11-14 05:21:46,330 INFO L325 BasicCegarLoop]: Counterexample might be feasible [2024-11-14 05:21:46,336 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 05:21:46,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:21:46,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 05:21:46,540 INFO L407 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2024-11-14 05:21:46,556 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 05:21:46,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 05:21:46 BoogieIcfgContainer [2024-11-14 05:21:46,559 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 05:21:46,560 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 05:21:46,560 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 05:21:46,560 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 05:21:46,561 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:11:06" (3/4) ... [2024-11-14 05:21:46,563 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-14 05:21:46,564 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 05:21:46,565 INFO L158 Benchmark]: Toolchain (without parser) took 640886.15ms. Allocated memory was 117.4MB in the beginning and 8.2GB in the end (delta: 8.1GB). Free memory was 93.8MB in the beginning and 7.8GB in the end (delta: -7.7GB). Peak memory consumption was 409.8MB. Max. memory is 16.1GB. [2024-11-14 05:21:46,565 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 167.8MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:21:46,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.07ms. Allocated memory is still 117.4MB. Free memory was 93.4MB in the beginning and 82.2MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 05:21:46,566 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.60ms. Allocated memory is still 117.4MB. Free memory was 82.2MB in the beginning and 80.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:21:46,566 INFO L158 Benchmark]: Boogie Preprocessor took 21.89ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 80.1MB in the end (delta: 696.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:21:46,566 INFO L158 Benchmark]: RCFGBuilder took 414.65ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 62.5MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 05:21:46,566 INFO L158 Benchmark]: TraceAbstraction took 640179.38ms. Allocated memory was 117.4MB in the beginning and 8.2GB in the end (delta: 8.1GB). Free memory was 61.7MB in the beginning and 7.8GB in the end (delta: -7.7GB). Peak memory consumption was 376.2MB. Max. memory is 16.1GB. [2024-11-14 05:21:46,567 INFO L158 Benchmark]: Witness Printer took 4.28ms. Allocated memory is still 8.2GB. Free memory was 7.8GB in the beginning and 7.8GB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:21:46,568 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 167.8MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.07ms. Allocated memory is still 117.4MB. Free memory was 93.4MB in the beginning and 82.2MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.60ms. Allocated memory is still 117.4MB. Free memory was 82.2MB in the beginning and 80.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.89ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 80.1MB in the end (delta: 696.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 414.65ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 62.5MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 640179.38ms. Allocated memory was 117.4MB in the beginning and 8.2GB in the end (delta: 8.1GB). Free memory was 61.7MB in the beginning and 7.8GB in the end (delta: -7.7GB). Peak memory consumption was 376.2MB. Max. memory is 16.1GB. * Witness Printer took 4.28ms. Allocated memory is still 8.2GB. Free memory was 7.8GB in the beginning and 7.8GB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 34]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L38] signed long long ARR_SIZE ; [L42] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L43] CALL assume_abort_if_not(ARR_SIZE > 1) [L32] COND TRUE !cond [L43] RET assume_abort_if_not(ARR_SIZE > 1) [L45] int array[ARR_SIZE][ARR_SIZE] ; [L47] int row = 0, column = 0, num = -1, value = 1 ; [L48] signed long long sum = 0; [L51] row=0 [L51] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/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 -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2024-11-14 05:21:49,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:21:49,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:21:49,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:21:49,893 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:21:49,893 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:21:49,898 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-patterns/array26_pattern.c Unable to find full path for "g++" [2024-11-14 05:21:51,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:21:52,156 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:21:52,159 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/sv-benchmarks/c/array-patterns/array26_pattern.c [2024-11-14 05:21:52,170 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/data/f9281a2b4/f6b7d5fec2f74babb65d790ffefa732e/FLAGc67baa1b3 [2024-11-14 05:21:52,195 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/data/f9281a2b4/f6b7d5fec2f74babb65d790ffefa732e [2024-11-14 05:21:52,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:21:52,200 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:21:52,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:21:52,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:21:52,214 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:21:52,215 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6d2c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52, skipping insertion in model container [2024-11-14 05:21:52,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,234 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:21:52,405 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_47a92563-d640-411b-a549-d1ad30647fe5/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2024-11-14 05:21:52,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:21:52,457 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:21:52,471 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_47a92563-d640-411b-a549-d1ad30647fe5/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2024-11-14 05:21:52,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:21:52,513 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:21:52,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52 WrapperNode [2024-11-14 05:21:52,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:21:52,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:21:52,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:21:52,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:21:52,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,555 INFO L138 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-11-14 05:21:52,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:21:52,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:21:52,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:21:52,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:21:52,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,568 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,569 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,575 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,579 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,583 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,584 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:21:52,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:21:52,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:21:52,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:21:52,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (1/1) ... [2024-11-14 05:21:52,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:21:52,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:52,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:21:52,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:21:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:21:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 05:21:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 05:21:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-14 05:21:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:21:52,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:21:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:21:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-14 05:21:52,758 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:21:52,760 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:21:53,116 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-14 05:21:53,116 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:21:53,125 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:21:53,126 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 05:21:53,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:21:53 BoogieIcfgContainer [2024-11-14 05:21:53,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:21:53,129 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:21:53,129 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:21:53,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:21:53,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:21:52" (1/3) ... [2024-11-14 05:21:53,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c87c276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:21:53, skipping insertion in model container [2024-11-14 05:21:53,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:21:52" (2/3) ... [2024-11-14 05:21:53,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c87c276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:21:53, skipping insertion in model container [2024-11-14 05:21:53,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:21:53" (3/3) ... [2024-11-14 05:21:53,137 INFO L112 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2024-11-14 05:21:53,153 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:21:53,155 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array26_pattern.c that has 1 procedures, 22 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-14 05:21:53,208 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:21:53,220 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;@643c3724, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:21:53,220 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:21:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 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 05:21:53,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:21:53,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:53,233 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:53,233 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:53,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash -320977475, now seen corresponding path program 1 times [2024-11-14 05:21:53,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:21:53,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213405789] [2024-11-14 05:21:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:53,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:53,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:21:53,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:21:53,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 05:21:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:53,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-14 05:21:53,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:53,364 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 05:21:53,365 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:21:53,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:21:53,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213405789] [2024-11-14 05:21:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213405789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:21:53,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:21:53,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:21:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524179480] [2024-11-14 05:21:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:21:53,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 05:21:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:21:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 05:21:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:21:53,393 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 05:21:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:53,406 INFO L93 Difference]: Finished difference Result 41 states and 62 transitions. [2024-11-14 05:21:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 05:21:53,408 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 05:21:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:53,414 INFO L225 Difference]: With dead ends: 41 [2024-11-14 05:21:53,415 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 05:21:53,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:21:53,420 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:53,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:21:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 05:21:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-14 05:21:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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 05:21:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-11-14 05:21:53,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2024-11-14 05:21:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:53,449 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-11-14 05:21:53,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 05:21:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-11-14 05:21:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:21:53,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:53,449 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:53,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-14 05:21:53,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:53,651 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:53,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1931940329, now seen corresponding path program 1 times [2024-11-14 05:21:53,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:21:53,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516648244] [2024-11-14 05:21:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:53,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:53,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:21:53,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:21:53,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 05:21:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:53,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:21:53,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:53,806 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 05:21:53,806 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:21:53,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:21:53,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516648244] [2024-11-14 05:21:53,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516648244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:21:53,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:21:53,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:21:53,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302759794] [2024-11-14 05:21:53,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:21:53,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:21:53,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:21:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:21:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:21:53,810 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 05:21:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:53,858 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-11-14 05:21:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:21:53,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 05:21:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:53,859 INFO L225 Difference]: With dead ends: 25 [2024-11-14 05:21:53,859 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 05:21:53,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:21:53,860 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 49 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 05:21:53,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 49 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:21:53,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 05:21:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 05:21:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 05:21:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2024-11-14 05:21:53,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2024-11-14 05:21:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:53,867 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2024-11-14 05:21:53,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 05:21:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2024-11-14 05:21:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:21:53,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:53,868 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:53,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-14 05:21:54,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:54,069 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:54,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1913589339, now seen corresponding path program 1 times [2024-11-14 05:21:54,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:21:54,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263123967] [2024-11-14 05:21:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:54,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:21:54,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:21:54,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 05:21:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:54,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:21:54,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:54,385 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:21:54,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:21:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263123967] [2024-11-14 05:21:54,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263123967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:21:54,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:21:54,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:21:54,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818994093] [2024-11-14 05:21:54,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:21:54,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:21:54,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:21:54,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:21:54,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:21:54,387 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 05:21:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:54,751 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-14 05:21:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:21:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2024-11-14 05:21:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:54,752 INFO L225 Difference]: With dead ends: 49 [2024-11-14 05:21:54,753 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 05:21:54,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:21:54,754 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:54,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:21:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 05:21:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2024-11-14 05:21:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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 05:21:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-11-14 05:21:54,764 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 14 [2024-11-14 05:21:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:54,764 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-11-14 05:21:54,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 05:21:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-11-14 05:21:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 05:21:54,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:54,766 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:54,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 05:21:54,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:54,967 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:54,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash 854930238, now seen corresponding path program 1 times [2024-11-14 05:21:54,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:21:54,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875685621] [2024-11-14 05:21:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:54,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:54,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:21:54,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:21:54,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-14 05:21:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:55,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:21:55,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:55,220 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:21:55,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:21:55,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875685621] [2024-11-14 05:21:55,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875685621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:21:55,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:21:55,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:21:55,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139209100] [2024-11-14 05:21:55,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:21:55,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:21:55,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:21:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:21:55,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:21:55,222 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 05:21:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:55,569 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2024-11-14 05:21:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:21:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 05:21:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:55,570 INFO L225 Difference]: With dead ends: 51 [2024-11-14 05:21:55,570 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 05:21:55,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:21:55,572 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:55,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 20 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:21:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 05:21:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2024-11-14 05:21:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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 05:21:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-14 05:21:55,582 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2024-11-14 05:21:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:55,582 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-14 05:21:55,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 05:21:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-14 05:21:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 05:21:55,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:55,583 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:55,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-14 05:21:55,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:55,784 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:55,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash 989001864, now seen corresponding path program 1 times [2024-11-14 05:21:55,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:21:55,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12163173] [2024-11-14 05:21:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:55,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:21:55,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:21:55,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:21:55,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-14 05:21:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:55,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:21:55,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:56,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:56,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 05:21:56,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12163173] [2024-11-14 05:21:56,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12163173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:56,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [109493608] [2024-11-14 05:21:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:56,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 05:21:56,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 05:21:56,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 05:21:56,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-14 05:21:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:56,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:21:56,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:56,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:56,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [109493608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930427099] [2024-11-14 05:21:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:56,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:56,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:56,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:56,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:21:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:56,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:21:56,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:21:57,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 05:21:57,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930427099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:57,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 05:21:57,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 7, 7] total 21 [2024-11-14 05:21:57,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156027880] [2024-11-14 05:21:57,618 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:57,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:21:57,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 05:21:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:21:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:21:57,624 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 05:21:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:59,361 INFO L93 Difference]: Finished difference Result 88 states and 124 transitions. [2024-11-14 05:21:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:21:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 05:21:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:59,363 INFO L225 Difference]: With dead ends: 88 [2024-11-14 05:21:59,366 INFO L226 Difference]: Without dead ends: 65 [2024-11-14 05:21:59,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2024-11-14 05:21:59,368 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 245 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:59,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 34 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 05:21:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-14 05:21:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2024-11-14 05:21:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 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 05:21:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-14 05:21:59,399 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 20 [2024-11-14 05:21:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:59,399 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-14 05:21:59,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 05:21:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-14 05:21:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 05:21:59,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:59,401 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:59,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-14 05:21:59,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-14 05:21:59,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 05:22:00,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:00,002 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:22:00,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:22:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2034385802, now seen corresponding path program 1 times [2024-11-14 05:22:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 05:22:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425617012] [2024-11-14 05:22:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:00,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 05:22:00,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 05:22:00,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 05:22:00,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47a92563-d640-411b-a549-d1ad30647fe5/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-14 05:22:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:00,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 05:22:00,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:22:00,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 05:22:01,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 05:22:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:22:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:22:01,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:22:01,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2024-11-14 05:22:02,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:22:02,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:22:02,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:22:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:22:02,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:22:02,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 48 [2024-11-14 05:22:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:04,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:32,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 515 treesize of output 499 [2024-11-14 05:22:34,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:22:35,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22158294019 treesize of output 21453650993 [2024-11-14 05:22:55,373 WARN L286 SmtUtils]: Spent 20.35s on a formula simplification. DAG size of input: 7854 DAG size of output: 1139 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)