./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp4.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_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/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_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/indp4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/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_73af99ae-51ab-465c-ab40-4badfb3b2618/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 5dacb0c2523573165d60080200ebb5b22db90f6a3f4c08906b6192cd2123eb78 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:57:57,377 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:57:57,484 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:57:57,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:57:57,490 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:57:57,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:57:57,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:57:57,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:57:57,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:57:57,516 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:57:57,516 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:57:57,517 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:57:57,517 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:57:57,517 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:57:57,517 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:57:57,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:57:57,520 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:57:57,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:57:57,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:57:57,521 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:57:57,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:57:57,522 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:57:57,522 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:57:57,522 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:57:57,522 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_73af99ae-51ab-465c-ab40-4badfb3b2618/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 -> 5dacb0c2523573165d60080200ebb5b22db90f6a3f4c08906b6192cd2123eb78 [2024-11-14 04:57:57,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:57:57,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:57:57,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:57:57,878 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:57:57,879 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:57:57,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-fpi/indp4.c Unable to find full path for "g++" [2024-11-14 04:57:59,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:58:00,093 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:58:00,096 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/sv-benchmarks/c/array-fpi/indp4.c [2024-11-14 04:58:00,118 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/data/ed62bf887/2685939c2f8c4dfd9d2a44b6e12a5389/FLAG8648165a8 [2024-11-14 04:58:00,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/data/ed62bf887/2685939c2f8c4dfd9d2a44b6e12a5389 [2024-11-14 04:58:00,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:58:00,395 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:58:00,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:58:00,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:58:00,401 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:58:00,402 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ecac5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00, skipping insertion in model container [2024-11-14 04:58:00,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,419 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:58:00,592 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_73af99ae-51ab-465c-ab40-4badfb3b2618/sv-benchmarks/c/array-fpi/indp4.c[588,601] [2024-11-14 04:58:00,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:58:00,640 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:58:00,656 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_73af99ae-51ab-465c-ab40-4badfb3b2618/sv-benchmarks/c/array-fpi/indp4.c[588,601] [2024-11-14 04:58:00,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:58:00,691 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:58:00,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00 WrapperNode [2024-11-14 04:58:00,692 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:58:00,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:58:00,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:58:00,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:58:00,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,728 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2024-11-14 04:58:00,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:58:00,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:58:00,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:58:00,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:58:00,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,738 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:58:00,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:58:00,756 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:58:00,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:58:00,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (1/1) ... [2024-11-14 04:58:00,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:58:00,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:00,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:58:00,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:58:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 04:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:58:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:58:00,897 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:58:00,898 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:58:01,054 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-14 04:58:01,054 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:58:01,110 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:58:01,110 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 04:58:01,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:58:01 BoogieIcfgContainer [2024-11-14 04:58:01,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:58:01,114 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:58:01,114 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:58:01,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:58:01,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:58:00" (1/3) ... [2024-11-14 04:58:01,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497723f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:58:01, skipping insertion in model container [2024-11-14 04:58:01,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:58:00" (2/3) ... [2024-11-14 04:58:01,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497723f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:58:01, skipping insertion in model container [2024-11-14 04:58:01,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:58:01" (3/3) ... [2024-11-14 04:58:01,124 INFO L112 eAbstractionObserver]: Analyzing ICFG indp4.c [2024-11-14 04:58:01,138 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:58:01,139 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG indp4.c that has 1 procedures, 12 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-14 04:58:01,203 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:58:01,217 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;@658d98ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:58:01,217 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:58:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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 04:58:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:58:01,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:01,233 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:01,234 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:01,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:01,239 INFO L85 PathProgramCache]: Analyzing trace with hash -391464456, now seen corresponding path program 1 times [2024-11-14 04:58:01,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494240060] [2024-11-14 04:58:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:01,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:01,550 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 04:58:01,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:01,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494240060] [2024-11-14 04:58:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494240060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:58:01,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:58:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:58:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629258297] [2024-11-14 04:58:01,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:58:01,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:58:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:58:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:58:01,596 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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 04:58:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:01,680 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2024-11-14 04:58:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:58:01,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 04:58:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:01,695 INFO L225 Difference]: With dead ends: 22 [2024-11-14 04:58:01,695 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 04:58:01,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:58:01,704 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:01,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:58:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 04:58:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-14 04:58:01,733 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 04:58:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-11-14 04:58:01,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2024-11-14 04:58:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:01,743 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-11-14 04:58:01,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 04:58:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2024-11-14 04:58:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:58:01,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:01,744 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:01,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:58:01,746 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:01,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1448204896, now seen corresponding path program 1 times [2024-11-14 04:58:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:01,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767999846] [2024-11-14 04:58:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:01,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:58:01,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:01,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767999846] [2024-11-14 04:58:01,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767999846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:58:01,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:58:01,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:58:01,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792311116] [2024-11-14 04:58:01,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:58:01,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:58:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:58:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:58:01,976 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:58:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:02,037 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2024-11-14 04:58:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:58:02,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 04:58:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:02,038 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:58:02,038 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 04:58:02,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 04:58:02,039 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:02,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:58:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 04:58:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2024-11-14 04:58:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 04:58:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-14 04:58:02,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2024-11-14 04:58:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:02,044 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-14 04:58:02,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:58:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-14 04:58:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:58:02,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:02,049 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:02,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:58:02,049 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:02,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash -420940672, now seen corresponding path program 1 times [2024-11-14 04:58:02,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:02,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260357340] [2024-11-14 04:58:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:58:02,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577144510] [2024-11-14 04:58:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:02,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:02,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:02,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:58:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:02,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:58:02,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:02,318 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 04:58:02,372 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 19 treesize of output 11 [2024-11-14 04:58:02,403 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 19 treesize of output 11 [2024-11-14 04:58:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:58:02,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:02,831 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 56 treesize of output 52 [2024-11-14 04:58:02,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:02,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 101 [2024-11-14 04:58:02,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:02,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 66 treesize of output 53 [2024-11-14 04:58:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:58:03,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260357340] [2024-11-14 04:58:03,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:58:03,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577144510] [2024-11-14 04:58:03,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577144510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:03,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344541511] [2024-11-14 04:58:03,041 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:58:03,041 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:03,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:03,049 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:03,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:03,788 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:04,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:58:04,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:04,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:58:04,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2024-11-14 04:58:04,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796870421] [2024-11-14 04:58:04,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:04,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:58:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:58:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:58:04,068 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 04:58:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:04,362 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-14 04:58:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:58:04,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 11 [2024-11-14 04:58:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:04,363 INFO L225 Difference]: With dead ends: 41 [2024-11-14 04:58:04,364 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 04:58:04,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-14 04:58:04,365 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:04,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:58:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 04:58:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2024-11-14 04:58:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:58:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2024-11-14 04:58:04,375 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 11 [2024-11-14 04:58:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:04,375 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2024-11-14 04:58:04,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 04:58:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2024-11-14 04:58:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 04:58:04,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:04,376 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:04,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:58:04,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:04,581 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:04,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1567475584, now seen corresponding path program 2 times [2024-11-14 04:58:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:04,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132577102] [2024-11-14 04:58:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:58:04,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132577102] [2024-11-14 04:58:04,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132577102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136529840] [2024-11-14 04:58:04,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:58:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:04,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:04,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:58:05,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:58:05,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:58:05,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 04:58:05,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:05,116 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 67 treesize of output 54 [2024-11-14 04:58:05,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 100 [2024-11-14 04:58:05,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 23 [2024-11-14 04:58:07,950 INFO L349 Elim1Store]: treesize reduction 98, result has 24.0 percent of original size [2024-11-14 04:58:07,950 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 5 case distinctions, treesize of input 81 treesize of output 79 [2024-11-14 04:58:10,124 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 19 treesize of output 11 [2024-11-14 04:58:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:58:10,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:10,769 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 56 treesize of output 52 [2024-11-14 04:58:10,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:10,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 107 [2024-11-14 04:58:10,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:10,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 67 treesize of output 52 [2024-11-14 04:58:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:58:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136529840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025277605] [2024-11-14 04:58:10,905 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:58:10,906 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:10,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:10,906 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:10,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:11,307 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:11,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '393#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:58:11,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:11,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:11,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 20 [2024-11-14 04:58:11,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056831633] [2024-11-14 04:58:11,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:11,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:58:11,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:58:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=548, Unknown=2, NotChecked=0, Total=650 [2024-11-14 04:58:11,682 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 04:58:18,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:58:20,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:58:25,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:58:27,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:58:31,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:58:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:32,278 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-11-14 04:58:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 04:58:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 04:58:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:32,281 INFO L225 Difference]: With dead ends: 86 [2024-11-14 04:58:32,281 INFO L226 Difference]: Without dead ends: 79 [2024-11-14 04:58:32,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=380, Invalid=1873, Unknown=3, NotChecked=0, Total=2256 [2024-11-14 04:58:32,283 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 125 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:32,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 105 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 364 Invalid, 4 Unknown, 0 Unchecked, 13.8s Time] [2024-11-14 04:58:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-14 04:58:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 27. [2024-11-14 04:58:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 04:58:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-11-14 04:58:32,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 13 [2024-11-14 04:58:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:32,303 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-11-14 04:58:32,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 04:58:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-11-14 04:58:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:58:32,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:32,303 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:32,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:58:32,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:32,504 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:32,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash 340707166, now seen corresponding path program 3 times [2024-11-14 04:58:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:32,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100560049] [2024-11-14 04:58:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:32,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:58:32,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:32,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100560049] [2024-11-14 04:58:32,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100560049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:32,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280477359] [2024-11-14 04:58:32,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:58:32,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:32,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:32,682 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:32,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:58:32,750 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:58:32,750 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:58:32,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:58:32,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:58:32,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:58:32,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280477359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:32,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790737189] [2024-11-14 04:58:32,825 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:58:32,825 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:32,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:32,826 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:32,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:33,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:33,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '706#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:58:33,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:33,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-14 04:58:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657947487] [2024-11-14 04:58:33,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:33,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:58:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:58:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-14 04:58:33,265 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 04:58:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:33,407 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2024-11-14 04:58:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:58:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 04:58:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:33,408 INFO L225 Difference]: With dead ends: 58 [2024-11-14 04:58:33,408 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 04:58:33,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:58:33,410 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:33,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:58:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 04:58:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2024-11-14 04:58:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 04:58:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-14 04:58:33,432 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2024-11-14 04:58:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:33,433 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-14 04:58:33,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 04:58:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-14 04:58:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:58:33,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:33,435 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:33,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:58:33,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:33,639 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:33,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1381631546, now seen corresponding path program 4 times [2024-11-14 04:58:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143354357] [2024-11-14 04:58:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:58:33,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143354357] [2024-11-14 04:58:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143354357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653783541] [2024-11-14 04:58:33,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:58:33,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:33,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:33,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:33,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:58:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:33,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:58:33,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:58:33,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:58:34,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653783541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:34,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003856790] [2024-11-14 04:58:34,021 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:58:34,021 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:34,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:34,022 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:34,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:34,264 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:34,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '937#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:58:34,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:34,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:34,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 04:58:34,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979310465] [2024-11-14 04:58:34,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:34,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:58:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:34,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:58:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:58:34,457 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 04:58:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:34,625 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-11-14 04:58:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:58:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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) Word has length 15 [2024-11-14 04:58:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:34,627 INFO L225 Difference]: With dead ends: 61 [2024-11-14 04:58:34,627 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 04:58:34,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:58:34,628 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:34,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 33 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:58:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 04:58:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2024-11-14 04:58:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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 04:58:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-14 04:58:34,651 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2024-11-14 04:58:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:34,652 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-14 04:58:34,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 04:58:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-14 04:58:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:58:34,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:34,652 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:34,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:58:34,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:34,854 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:34,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1776530176, now seen corresponding path program 5 times [2024-11-14 04:58:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:34,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452235767] [2024-11-14 04:58:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:58:34,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298705658] [2024-11-14 04:58:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:58:34,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:34,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:34,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:58:35,139 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:58:35,139 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:58:35,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 04:58:35,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:35,160 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 04:58:35,176 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 04:58:35,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:35,199 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 32 [2024-11-14 04:58:35,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:35,257 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 37 treesize of output 35 [2024-11-14 04:58:35,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:35,296 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 39 treesize of output 35 [2024-11-14 04:58:35,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:35,333 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 39 treesize of output 35 [2024-11-14 04:58:35,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:35,399 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 37 treesize of output 35 [2024-11-14 04:58:35,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:35,447 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 39 treesize of output 35 [2024-11-14 04:58:35,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:35,494 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 39 treesize of output 35 [2024-11-14 04:58:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:58:35,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:36,711 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 56 treesize of output 52 [2024-11-14 04:58:36,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:36,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 101 [2024-11-14 04:58:36,866 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-14 04:58:36,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 163 [2024-11-14 04:58:36,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:36,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 62 treesize of output 62 [2024-11-14 04:58:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:58:37,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452235767] [2024-11-14 04:58:37,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:58:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298705658] [2024-11-14 04:58:37,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298705658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510045855] [2024-11-14 04:58:37,077 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:58:37,077 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:37,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:37,077 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:37,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:37,302 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:37,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1211#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:58:37,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:37,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:58:37,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2024-11-14 04:58:37,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77388807] [2024-11-14 04:58:37,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:37,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:58:37,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:58:37,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:58:37,577 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 04:58:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:41,782 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2024-11-14 04:58:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 04:58:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 17 [2024-11-14 04:58:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:41,784 INFO L225 Difference]: With dead ends: 121 [2024-11-14 04:58:41,784 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 04:58:41,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:58:41,786 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:41,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 94 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 04:58:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 04:58:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 62. [2024-11-14 04:58:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 states have internal predecessors, (84), 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 04:58:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2024-11-14 04:58:41,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 17 [2024-11-14 04:58:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:41,850 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2024-11-14 04:58:41,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 04:58:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2024-11-14 04:58:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:58:41,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:41,851 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:41,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:58:42,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:58:42,052 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:42,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1974383804, now seen corresponding path program 1 times [2024-11-14 04:58:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:42,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105047288] [2024-11-14 04:58:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:42,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:58:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939626296] [2024-11-14 04:58:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:42,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:42,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:42,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:42,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:58:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:42,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 04:58:42,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:42,231 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 13 treesize of output 9 [2024-11-14 04:58:42,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:42,262 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 25 treesize of output 20 [2024-11-14 04:58:42,285 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 23 treesize of output 13 [2024-11-14 04:58:42,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:42,322 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 25 treesize of output 20 [2024-11-14 04:58:42,345 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 23 treesize of output 13 [2024-11-14 04:58:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:58:42,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:43,076 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 56 treesize of output 52 [2024-11-14 04:58:43,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:43,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 101 [2024-11-14 04:58:43,134 INFO L349 Elim1Store]: treesize reduction 23, result has 39.5 percent of original size [2024-11-14 04:58:43,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 50 [2024-11-14 04:58:43,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:43,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 27 treesize of output 25 [2024-11-14 04:58:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:58:43,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105047288] [2024-11-14 04:58:43,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:58:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939626296] [2024-11-14 04:58:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939626296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716100944] [2024-11-14 04:58:43,248 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:58:43,248 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:43,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:43,248 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:43,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:43,452 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:43,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1661#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:58:43,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:43,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:58:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2024-11-14 04:58:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761313656] [2024-11-14 04:58:43,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:43,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:58:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:58:43,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:58:43,761 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 04:58:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:45,088 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-11-14 04:58:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 04:58:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 17 [2024-11-14 04:58:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:45,089 INFO L225 Difference]: With dead ends: 115 [2024-11-14 04:58:45,089 INFO L226 Difference]: Without dead ends: 99 [2024-11-14 04:58:45,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 04:58:45,091 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:45,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 115 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:58:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-14 04:58:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2024-11-14 04:58:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 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 04:58:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2024-11-14 04:58:45,150 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 17 [2024-11-14 04:58:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:45,150 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2024-11-14 04:58:45,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 04:58:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2024-11-14 04:58:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:58:45,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:45,153 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:45,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:58:45,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:45,353 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:45,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash -794042812, now seen corresponding path program 2 times [2024-11-14 04:58:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:45,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891952162] [2024-11-14 04:58:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:58:45,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:45,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891952162] [2024-11-14 04:58:45,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891952162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:45,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407178405] [2024-11-14 04:58:45,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:58:45,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:45,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:45,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:45,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:58:45,743 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:58:45,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:58:45,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 04:58:45,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:45,772 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 67 treesize of output 54 [2024-11-14 04:58:45,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 100 [2024-11-14 04:58:45,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 23 [2024-11-14 04:58:46,139 INFO L349 Elim1Store]: treesize reduction 98, result has 24.0 percent of original size [2024-11-14 04:58:46,140 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 5 case distinctions, treesize of input 81 treesize of output 79 [2024-11-14 04:58:46,298 INFO L349 Elim1Store]: treesize reduction 62, result has 53.4 percent of original size [2024-11-14 04:58:46,298 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 5 case distinctions, treesize of input 87 treesize of output 123 [2024-11-14 04:58:46,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:58:46,620 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 25 treesize of output 20 [2024-11-14 04:58:46,664 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 23 treesize of output 13 [2024-11-14 04:58:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:58:46,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:58:50,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407178405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:50,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698808338] [2024-11-14 04:58:50,362 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:58:50,362 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:50,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:50,362 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:50,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:50,561 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:51,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2135#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:58:51,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:51,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:51,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 34 [2024-11-14 04:58:51,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304537549] [2024-11-14 04:58:51,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:51,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 04:58:51,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:51,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 04:58:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1357, Unknown=1, NotChecked=0, Total=1560 [2024-11-14 04:58:51,014 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 04:58:55,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:58:59,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:59:07,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:59:10,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:59:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:14,071 INFO L93 Difference]: Finished difference Result 154 states and 187 transitions. [2024-11-14 04:59:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 04:59:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 19 [2024-11-14 04:59:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:14,073 INFO L225 Difference]: With dead ends: 154 [2024-11-14 04:59:14,073 INFO L226 Difference]: Without dead ends: 144 [2024-11-14 04:59:14,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=746, Invalid=5102, Unknown=4, NotChecked=0, Total=5852 [2024-11-14 04:59:14,075 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 288 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 99 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:14,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 222 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 800 Invalid, 4 Unknown, 0 Unchecked, 12.0s Time] [2024-11-14 04:59:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-14 04:59:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 71. [2024-11-14 04:59:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 70 states have internal predecessors, (96), 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 04:59:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2024-11-14 04:59:14,136 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 19 [2024-11-14 04:59:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:14,137 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2024-11-14 04:59:14,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 04:59:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2024-11-14 04:59:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:59:14,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:14,137 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:14,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:59:14,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:14,338 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:14,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash -901768960, now seen corresponding path program 6 times [2024-11-14 04:59:14,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:14,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353702976] [2024-11-14 04:59:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:14,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:59:14,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353702976] [2024-11-14 04:59:14,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353702976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589185383] [2024-11-14 04:59:14,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:59:14,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:14,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:14,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:14,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:59:14,783 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:59:14,783 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:59:14,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:59:14,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:59:14,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:59:15,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589185383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:15,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200868423] [2024-11-14 04:59:15,028 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:59:15,028 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:15,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:15,029 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:15,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:15,194 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:15,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2732#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:59:15,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:15,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:15,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2024-11-14 04:59:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236382674] [2024-11-14 04:59:15,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:15,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 04:59:15,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 04:59:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2024-11-14 04:59:15,381 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 04:59:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:16,243 INFO L93 Difference]: Finished difference Result 175 states and 217 transitions. [2024-11-14 04:59:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 04:59:16,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 04:59:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:16,245 INFO L225 Difference]: With dead ends: 175 [2024-11-14 04:59:16,245 INFO L226 Difference]: Without dead ends: 149 [2024-11-14 04:59:16,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 04:59:16,247 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 175 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:16,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 264 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:59:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-14 04:59:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 69. [2024-11-14 04:59:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 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 04:59:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2024-11-14 04:59:16,310 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 21 [2024-11-14 04:59:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:16,311 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2024-11-14 04:59:16,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 04:59:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2024-11-14 04:59:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:59:16,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:16,312 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:16,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:59:16,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:16,512 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:16,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1749419040, now seen corresponding path program 7 times [2024-11-14 04:59:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:16,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518728631] [2024-11-14 04:59:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:16,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:59:16,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:16,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518728631] [2024-11-14 04:59:16,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518728631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:16,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950441921] [2024-11-14 04:59:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:59:16,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:16,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:16,708 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:16,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:59:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:16,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:59:16,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:59:16,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:59:16,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950441921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:16,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1922588774] [2024-11-14 04:59:16,925 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:59:16,925 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:16,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:16,926 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:16,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:17,078 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:17,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3317#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:59:17,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:17,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:17,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-11-14 04:59:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090953292] [2024-11-14 04:59:17,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:17,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:59:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:59:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:59:17,254 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:17,477 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2024-11-14 04:59:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:59:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 04:59:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:17,478 INFO L225 Difference]: With dead ends: 122 [2024-11-14 04:59:17,478 INFO L226 Difference]: Without dead ends: 70 [2024-11-14 04:59:17,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:59:17,479 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:17,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 36 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-14 04:59:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2024-11-14 04:59:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 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 04:59:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2024-11-14 04:59:17,518 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2024-11-14 04:59:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:17,518 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2024-11-14 04:59:17,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2024-11-14 04:59:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:59:17,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:17,519 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:17,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:59:17,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:17,723 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:17,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:17,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1797783368, now seen corresponding path program 8 times [2024-11-14 04:59:17,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:17,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92819620] [2024-11-14 04:59:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:17,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:59:17,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:17,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92819620] [2024-11-14 04:59:17,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92819620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:17,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463694285] [2024-11-14 04:59:17,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:59:17,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:17,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:17,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:17,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:59:18,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:59:18,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:59:18,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:59:18,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:59:18,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:59:18,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463694285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:18,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146378318] [2024-11-14 04:59:18,664 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:59:18,664 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:18,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:18,664 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:18,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:18,881 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:19,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3780#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:59:19,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:19,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:19,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2024-11-14 04:59:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263316769] [2024-11-14 04:59:19,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:19,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 04:59:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 04:59:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 04:59:19,095 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 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 04:59:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:20,130 INFO L93 Difference]: Finished difference Result 159 states and 182 transitions. [2024-11-14 04:59:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 04:59:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 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) Word has length 22 [2024-11-14 04:59:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:20,132 INFO L225 Difference]: With dead ends: 159 [2024-11-14 04:59:20,132 INFO L226 Difference]: Without dead ends: 133 [2024-11-14 04:59:20,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 04:59:20,133 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 326 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:20,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 407 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:59:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-14 04:59:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 73. [2024-11-14 04:59:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 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 04:59:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2024-11-14 04:59:20,200 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 22 [2024-11-14 04:59:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:20,200 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2024-11-14 04:59:20,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 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 04:59:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2024-11-14 04:59:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:59:20,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:20,201 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:20,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:59:20,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:20,402 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:20,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2046465732, now seen corresponding path program 3 times [2024-11-14 04:59:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:20,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380153022] [2024-11-14 04:59:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:20,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:59:20,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148752095] [2024-11-14 04:59:20,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:59:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:20,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:20,633 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:59:20,928 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:59:20,928 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:59:20,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-14 04:59:20,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:20,946 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 13 treesize of output 9 [2024-11-14 04:59:20,960 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 23 treesize of output 22 [2024-11-14 04:59:20,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:20,979 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 32 treesize of output 34 [2024-11-14 04:59:21,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,028 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 43 treesize of output 44 [2024-11-14 04:59:21,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,061 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 37 [2024-11-14 04:59:21,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,094 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 37 [2024-11-14 04:59:21,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,123 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 37 [2024-11-14 04:59:21,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,186 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 43 treesize of output 44 [2024-11-14 04:59:21,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,221 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 37 [2024-11-14 04:59:21,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,256 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 37 [2024-11-14 04:59:21,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:21,292 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 37 [2024-11-14 04:59:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:21,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:28,825 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 56 treesize of output 52 [2024-11-14 04:59:28,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:28,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 101 [2024-11-14 04:59:29,226 INFO L349 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2024-11-14 04:59:29,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 2861 treesize of output 2824 [2024-11-14 04:59:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:30,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380153022] [2024-11-14 04:59:30,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:59:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148752095] [2024-11-14 04:59:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148752095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531470498] [2024-11-14 04:59:30,217 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:59:30,217 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:30,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:30,218 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:30,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:30,384 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:31,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4400#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:59:31,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:31,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:59:31,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2024-11-14 04:59:31,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922576233] [2024-11-14 04:59:31,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:31,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:59:31,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:59:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:59:31,377 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 41 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 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 04:59:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:47,714 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2024-11-14 04:59:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:59:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 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) Word has length 23 [2024-11-14 04:59:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:47,717 INFO L225 Difference]: With dead ends: 118 [2024-11-14 04:59:47,717 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 04:59:47,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=547, Invalid=4855, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 04:59:47,719 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:47,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 114 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-14 04:59:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 04:59:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2024-11-14 04:59:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:59:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-11-14 04:59:47,788 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 23 [2024-11-14 04:59:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:47,788 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-11-14 04:59:47,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 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 04:59:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-11-14 04:59:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:59:47,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:47,789 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:47,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:59:47,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:59:47,989 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:47,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash -423327810, now seen corresponding path program 9 times [2024-11-14 04:59:47,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:47,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103460066] [2024-11-14 04:59:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:59:48,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:48,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103460066] [2024-11-14 04:59:48,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103460066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:48,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228194135] [2024-11-14 04:59:48,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:59:48,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:48,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:48,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:48,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:59:48,420 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:59:48,420 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:59:48,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:59:48,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:59:48,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:59:48,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228194135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:48,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1858493757] [2024-11-14 04:59:48,672 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:59:48,672 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:48,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:48,672 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:48,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:48,846 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:49,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4937#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 04:59:49,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:49,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-14 04:59:49,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359114061] [2024-11-14 04:59:49,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:49,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 04:59:49,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 04:59:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:59:49,047 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 04:59:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:49,338 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2024-11-14 04:59:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:59:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 24 [2024-11-14 04:59:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:49,339 INFO L225 Difference]: With dead ends: 141 [2024-11-14 04:59:49,339 INFO L226 Difference]: Without dead ends: 112 [2024-11-14 04:59:49,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 04:59:49,341 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:49,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 81 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-14 04:59:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 76. [2024-11-14 04:59:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 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 04:59:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2024-11-14 04:59:49,402 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 24 [2024-11-14 04:59:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:49,403 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2024-11-14 04:59:49,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 04:59:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2024-11-14 04:59:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:59:49,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:49,404 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:49,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:59:49,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:59:49,608 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:49,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1970411656, now seen corresponding path program 10 times [2024-11-14 04:59:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:49,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330952354] [2024-11-14 04:59:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:59:49,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650160210] [2024-11-14 04:59:49,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:59:49,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:49,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:49,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:49,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:59:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:50,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-14 04:59:50,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:50,575 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 04:59:50,591 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 04:59:50,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:50,615 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 32 [2024-11-14 04:59:50,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:50,650 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 39 treesize of output 44 [2024-11-14 04:59:50,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:50,695 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 48 treesize of output 56 [2024-11-14 04:59:50,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:50,746 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 57 treesize of output 68 [2024-11-14 04:59:50,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:50,864 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 64 treesize of output 71 [2024-11-14 04:59:50,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:50,937 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 66 treesize of output 71 [2024-11-14 04:59:51,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,012 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 66 treesize of output 71 [2024-11-14 04:59:51,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,069 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 66 treesize of output 71 [2024-11-14 04:59:51,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,132 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 66 treesize of output 71 [2024-11-14 04:59:51,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,190 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 66 treesize of output 71 [2024-11-14 04:59:51,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,305 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 64 treesize of output 71 [2024-11-14 04:59:51,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,374 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 66 treesize of output 71 [2024-11-14 04:59:51,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,442 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 66 treesize of output 71 [2024-11-14 04:59:51,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,516 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 66 treesize of output 71 [2024-11-14 04:59:51,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,587 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 66 treesize of output 71 [2024-11-14 04:59:51,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:51,659 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 66 treesize of output 71 [2024-11-14 04:59:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:59:51,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:00:22,913 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 56 treesize of output 52 [2024-11-14 05:00:22,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:00:22,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 101 [2024-11-14 05:00:23,192 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-14 05:00:23,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14401 treesize of output 14333 [2024-11-14 05:00:23,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:00:23,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 28513 treesize of output 28451 [2024-11-14 05:00:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:00:24,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330952354] [2024-11-14 05:00:24,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:00:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650160210] [2024-11-14 05:00:24,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650160210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:00:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471327864] [2024-11-14 05:00:24,279 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 05:00:24,279 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:00:24,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:00:24,280 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:00:24,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:00:24,415 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:00:25,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5502#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 05:00:25,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:00:25,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:00:25,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 39 [2024-11-14 05:00:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127972148] [2024-11-14 05:00:25,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:00:25,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 05:00:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 05:00:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 05:00:25,325 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:00:45,505 WARN L286 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 116 DAG size of output: 86 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:00:49,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:01:42,433 WARN L286 SmtUtils]: Spent 15.85s on a formula simplification. DAG size of input: 117 DAG size of output: 87 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:01:44,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:01:48,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:02:15,285 WARN L286 SmtUtils]: Spent 10.40s on a formula simplification. DAG size of input: 116 DAG size of output: 86 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:02:41,228 WARN L286 SmtUtils]: Spent 11.43s on a formula simplification. DAG size of input: 129 DAG size of output: 99 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:02:43,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:03:17,065 WARN L286 SmtUtils]: Spent 16.77s on a formula simplification. DAG size of input: 131 DAG size of output: 101 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:03:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:03:28,217 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2024-11-14 05:03:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 05:03:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-14 05:03:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:03:28,220 INFO L225 Difference]: With dead ends: 192 [2024-11-14 05:03:28,220 INFO L226 Difference]: Without dead ends: 190 [2024-11-14 05:03:28,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 182.6s TimeCoverageRelationStatistics Valid=899, Invalid=3391, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:03:28,223 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 366 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:03:28,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 249 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 28.3s Time] [2024-11-14 05:03:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-14 05:03:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 111. [2024-11-14 05:03:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 110 states have internal predecessors, (138), 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 05:03:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2024-11-14 05:03:28,327 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 26 [2024-11-14 05:03:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:03:28,328 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2024-11-14 05:03:28,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:03:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2024-11-14 05:03:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 05:03:28,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:03:28,329 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:03:28,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:03:28,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 05:03:28,530 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:03:28,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:03:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 917686272, now seen corresponding path program 4 times [2024-11-14 05:03:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:03:28,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121496117] [2024-11-14 05:03:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:03:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:03:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281919792] [2024-11-14 05:03:28,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:03:28,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:03:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:03:28,775 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:03:28,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:03:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:29,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-14 05:03:29,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:03:29,988 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 13 treesize of output 9 [2024-11-14 05:03:30,011 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 23 treesize of output 22 [2024-11-14 05:03:30,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,046 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 32 treesize of output 34 [2024-11-14 05:03:30,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,158 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 43 treesize of output 44 [2024-11-14 05:03:30,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,225 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 49 treesize of output 48 [2024-11-14 05:03:30,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,284 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 37 [2024-11-14 05:03:30,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,344 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 37 [2024-11-14 05:03:30,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,412 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 37 [2024-11-14 05:03:30,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,539 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 43 treesize of output 44 [2024-11-14 05:03:30,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,609 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 49 treesize of output 48 [2024-11-14 05:03:30,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,682 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 37 [2024-11-14 05:03:30,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,751 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 37 [2024-11-14 05:03:30,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:30,831 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 37 [2024-11-14 05:03:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:03:31,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:03:49,708 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 56 treesize of output 52 [2024-11-14 05:03:49,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:49,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 101 [2024-11-14 05:03:49,844 INFO L349 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2024-11-14 05:03:49,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 174 [2024-11-14 05:03:49,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:03:50,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 153 treesize of output 136 [2024-11-14 05:03:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:03:51,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:03:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121496117] [2024-11-14 05:03:51,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:03:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281919792] [2024-11-14 05:03:51,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281919792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:03:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584469022] [2024-11-14 05:03:51,656 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 05:03:51,656 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:03:51,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:03:51,656 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:03:51,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:03:51,860 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:03:54,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6264#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 05:03:54,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:03:54,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:03:54,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2024-11-14 05:03:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335406137] [2024-11-14 05:03:54,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:03:54,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:03:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:03:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:03:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2246, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 05:03:54,273 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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 05:03:57,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:04:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:51,416 INFO L93 Difference]: Finished difference Result 199 states and 230 transitions. [2024-11-14 05:04:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 05:04:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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 29 [2024-11-14 05:04:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:51,418 INFO L225 Difference]: With dead ends: 199 [2024-11-14 05:04:51,418 INFO L226 Difference]: Without dead ends: 171 [2024-11-14 05:04:51,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=696, Invalid=5624, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 05:04:51,420 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 221 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:51,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 236 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2024-11-14 05:04:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-14 05:04:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 108. [2024-11-14 05:04:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.280373831775701) internal successors, (137), 107 states have internal predecessors, (137), 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 05:04:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2024-11-14 05:04:51,529 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 29 [2024-11-14 05:04:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:51,529 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2024-11-14 05:04:51,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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 05:04:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2024-11-14 05:04:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 05:04:51,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:51,530 INFO L215 NwaCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:51,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 05:04:51,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 05:04:51,731 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:51,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1398764888, now seen corresponding path program 11 times [2024-11-14 05:04:51,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:51,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787712386] [2024-11-14 05:04:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:51,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 05:04:52,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:52,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787712386] [2024-11-14 05:04:52,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787712386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:52,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141962209] [2024-11-14 05:04:52,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:04:52,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:52,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:52,240 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:52,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:04:56,081 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 05:04:56,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:04:56,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:04:56,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 05:04:56,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 05:04:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141962209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079835138] [2024-11-14 05:04:56,471 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 05:04:56,472 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:56,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:56,472 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:56,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:56,652 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:56,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7052#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 05:04:56,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:04:56,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:04:56,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2024-11-14 05:04:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962171653] [2024-11-14 05:04:56,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:04:56,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 05:04:56,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:56,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 05:04:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2024-11-14 05:04:56,921 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand has 25 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 05:04:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:57,494 INFO L93 Difference]: Finished difference Result 207 states and 245 transitions. [2024-11-14 05:04:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:04:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 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) Word has length 30 [2024-11-14 05:04:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:57,496 INFO L225 Difference]: With dead ends: 207 [2024-11-14 05:04:57,496 INFO L226 Difference]: Without dead ends: 155 [2024-11-14 05:04:57,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 63 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 05:04:57,497 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:57,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 102 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:04:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-14 05:04:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 112. [2024-11-14 05:04:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 states have internal predecessors, (133), 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 05:04:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2024-11-14 05:04:57,638 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2024-11-14 05:04:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:57,638 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2024-11-14 05:04:57,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 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 05:04:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2024-11-14 05:04:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 05:04:57,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:57,639 INFO L215 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:57,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 05:04:57,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:04:57,840 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:57,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1051909184, now seen corresponding path program 12 times [2024-11-14 05:04:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:57,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755957068] [2024-11-14 05:04:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:04:58,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755957068] [2024-11-14 05:04:58,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755957068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715122806] [2024-11-14 05:04:58,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:04:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:58,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:58,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:04:58,592 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:04:58,592 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:04:58,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:04:58,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 44 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 05:04:58,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 44 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 05:04:59,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715122806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:59,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [51361867] [2024-11-14 05:04:59,041 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 05:04:59,041 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:59,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:59,041 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:59,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:59,231 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:59,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7828#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 05:04:59,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:04:59,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:04:59,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 29 [2024-11-14 05:04:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247283592] [2024-11-14 05:04:59,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:04:59,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 05:04:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 05:04:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:04:59,561 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 05:05:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:05:00,536 INFO L93 Difference]: Finished difference Result 273 states and 305 transitions. [2024-11-14 05:05:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 05:05:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 31 [2024-11-14 05:05:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:05:00,539 INFO L225 Difference]: With dead ends: 273 [2024-11-14 05:05:00,539 INFO L226 Difference]: Without dead ends: 238 [2024-11-14 05:05:00,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=1873, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:05:00,540 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 402 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:05:00,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 168 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:05:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-14 05:05:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 167. [2024-11-14 05:05:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 166 states have internal predecessors, (195), 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 05:05:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2024-11-14 05:05:00,714 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 31 [2024-11-14 05:05:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:05:00,715 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2024-11-14 05:05:00,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 05:05:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2024-11-14 05:05:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:05:00,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:05:00,715 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:05:00,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 05:05:00,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:05:00,916 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:05:00,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:05:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2051280472, now seen corresponding path program 13 times [2024-11-14 05:05:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:05:00,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263857838] [2024-11-14 05:05:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:05:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 05:05:01,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:05:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263857838] [2024-11-14 05:05:01,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263857838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:05:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699867916] [2024-11-14 05:05:01,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:05:01,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:01,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:05:01,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:05:01,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:05:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:01,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:05:01,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:05:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:05:02,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:05:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:05:02,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699867916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:05:02,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829525043] [2024-11-14 05:05:02,970 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 05:05:02,970 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:05:02,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:05:02,970 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:05:02,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:05:03,215 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:05:03,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8835#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 1)))' at error location [2024-11-14 05:05:03,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:05:03,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:05:03,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 46 [2024-11-14 05:05:03,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649522528] [2024-11-14 05:05:03,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:05:03,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:05:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:05:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:05:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 05:05:03,596 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 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 05:05:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:05:06,630 INFO L93 Difference]: Finished difference Result 334 states and 367 transitions. [2024-11-14 05:05:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 05:05:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 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 32 [2024-11-14 05:05:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:05:06,633 INFO L225 Difference]: With dead ends: 334 [2024-11-14 05:05:06,633 INFO L226 Difference]: Without dead ends: 263 [2024-11-14 05:05:06,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1566, Invalid=9990, Unknown=0, NotChecked=0, Total=11556 [2024-11-14 05:05:06,637 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 937 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:05:06,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 540 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:05:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-14 05:05:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 165. [2024-11-14 05:05:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 164 states have internal predecessors, (187), 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 05:05:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2024-11-14 05:05:06,816 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 32 [2024-11-14 05:05:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:05:06,816 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2024-11-14 05:05:06,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 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 05:05:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2024-11-14 05:05:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:05:06,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:05:06,817 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:05:06,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 05:05:07,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:07,018 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:05:07,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:05:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1087116100, now seen corresponding path program 5 times [2024-11-14 05:05:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:05:07,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458715476] [2024-11-14 05:05:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:07,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:05:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:05:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587735616] [2024-11-14 05:05:07,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:05:07,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:07,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:05:07,298 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:05:07,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73af99ae-51ab-465c-ab40-4badfb3b2618/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:05:14,675 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 05:05:14,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:05:14,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-14 05:05:14,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:05:14,711 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 05:05:14,731 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 05:05:14,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:14,757 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 32 [2024-11-14 05:05:14,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:14,793 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 39 treesize of output 44 [2024-11-14 05:05:14,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:14,844 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 48 treesize of output 56 [2024-11-14 05:05:14,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:14,899 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 57 treesize of output 68 [2024-11-14 05:05:14,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:14,962 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 66 treesize of output 80 [2024-11-14 05:05:15,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,126 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 73 treesize of output 83 [2024-11-14 05:05:15,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,224 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 75 treesize of output 83 [2024-11-14 05:05:15,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,321 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 75 treesize of output 83 [2024-11-14 05:05:15,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,422 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 75 treesize of output 83 [2024-11-14 05:05:15,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,523 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 75 treesize of output 83 [2024-11-14 05:05:15,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,615 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 75 treesize of output 83 [2024-11-14 05:05:15,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,705 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 75 treesize of output 83 [2024-11-14 05:05:15,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,851 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 73 treesize of output 83 [2024-11-14 05:05:15,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:15,928 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 75 treesize of output 83 [2024-11-14 05:05:16,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:16,005 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 75 treesize of output 83 [2024-11-14 05:05:16,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:16,099 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 75 treesize of output 83 [2024-11-14 05:05:16,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:16,193 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 75 treesize of output 83 [2024-11-14 05:05:16,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:16,280 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 75 treesize of output 83 [2024-11-14 05:05:16,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:05:16,402 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 75 treesize of output 83 [2024-11-14 05:05:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:05:16,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:05:53,551 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (+ (* (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ (* (mod (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8))) (.cse13 (+ (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse15 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (* (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse18 (* .cse2 8))) (and (let ((.cse0 (let ((.cse3 (let ((.cse6 (let ((.cse8 (let ((.cse10 (let ((.cse12 (let ((.cse14 (let ((.cse17 (+ .cse18 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse16 .cse17 (+ .cse5 (select .cse16 .cse17)))))) (store .cse14 .cse15 (+ (- 1) .cse5 (select .cse14 .cse15)))))) (store .cse12 .cse13 (+ (- 2) (select .cse12 .cse13) .cse5))))) (store .cse10 .cse11 (+ (select .cse10 .cse11) (- 3) .cse5))))) (store .cse8 .cse9 (+ (- 4) .cse5 (select .cse8 .cse9)))))) (store .cse6 .cse7 (+ (select .cse6 .cse7) (- 5) .cse5))))) (store .cse3 .cse4 (+ (select .cse3 .cse4) (- 6) .cse5))))) (or (not (= 1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 2 (select .cse0 .cse1)) (< .cse2 2147483648))) (let ((.cse19 (let ((.cse20 (let ((.cse21 (let ((.cse22 (let ((.cse23 (let ((.cse24 (let ((.cse25 (let ((.cse26 (+ .cse18 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse16 .cse26 (+ .cse5 (select .cse16 .cse26)))))) (store .cse25 .cse15 (+ (- 1) .cse5 (select .cse25 .cse15)))))) (store .cse24 .cse13 (+ (- 2) (select .cse24 .cse13) .cse5))))) (store .cse23 .cse11 (+ (- 3) (select .cse23 .cse11) .cse5))))) (store .cse22 .cse9 (+ (select .cse22 .cse9) (- 4) .cse5))))) (store .cse21 .cse7 (+ (select .cse21 .cse7) (- 5) .cse5))))) (store .cse20 .cse4 (+ (- 6) .cse5 (select .cse20 .cse4)))))) (or (not (= (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) (< 2147483647 .cse2) (= 2 (select .cse19 .cse1))))))) is different from false [2024-11-14 05:05:55,559 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse2 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (+ (* (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ (* (mod (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8))) (.cse13 (+ (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse15 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (* (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse18 (* .cse2 8))) (and (let ((.cse0 (let ((.cse3 (let ((.cse6 (let ((.cse8 (let ((.cse10 (let ((.cse12 (let ((.cse14 (let ((.cse17 (+ .cse18 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse16 .cse17 (+ .cse5 (select .cse16 .cse17)))))) (store .cse14 .cse15 (+ (- 1) .cse5 (select .cse14 .cse15)))))) (store .cse12 .cse13 (+ (- 2) (select .cse12 .cse13) .cse5))))) (store .cse10 .cse11 (+ (select .cse10 .cse11) (- 3) .cse5))))) (store .cse8 .cse9 (+ (- 4) .cse5 (select .cse8 .cse9)))))) (store .cse6 .cse7 (+ (select .cse6 .cse7) (- 5) .cse5))))) (store .cse3 .cse4 (+ (select .cse3 .cse4) (- 6) .cse5))))) (or (not (= 1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 2 (select .cse0 .cse1)) (< .cse2 2147483648))) (let ((.cse19 (let ((.cse20 (let ((.cse21 (let ((.cse22 (let ((.cse23 (let ((.cse24 (let ((.cse25 (let ((.cse26 (+ .cse18 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse16 .cse26 (+ .cse5 (select .cse16 .cse26)))))) (store .cse25 .cse15 (+ (- 1) .cse5 (select .cse25 .cse15)))))) (store .cse24 .cse13 (+ (- 2) (select .cse24 .cse13) .cse5))))) (store .cse23 .cse11 (+ (- 3) (select .cse23 .cse11) .cse5))))) (store .cse22 .cse9 (+ (select .cse22 .cse9) (- 4) .cse5))))) (store .cse21 .cse7 (+ (select .cse21 .cse7) (- 5) .cse5))))) (store .cse20 .cse4 (+ (- 6) .cse5 (select .cse20 .cse4)))))) (or (not (= (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) (< 2147483647 .cse2) (= 2 (select .cse19 .cse1))))))) is different from true [2024-11-14 05:07:31,255 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 56 treesize of output 52 [2024-11-14 05:07:34,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:07:34,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 101 [2024-11-14 05:07:35,552 INFO L349 Elim1Store]: treesize reduction 54, result has 40.7 percent of original size [2024-11-14 05:07:35,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 122293 treesize of output 122145 [2024-11-14 05:07:39,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 05:07:39,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 1890199 treesize of output 1886028 [2024-11-14 05:07:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 78 refuted. 1 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-14 05:07:43,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:07:43,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458715476] [2024-11-14 05:07:43,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:07:43,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587735616] [2024-11-14 05:07:43,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587735616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:07:43,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583867607] [2024-11-14 05:07:43,157 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 05:07:43,157 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:07:43,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:07:43,157 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:07:43,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:07:43,345 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:07:54,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10016#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 05:07:54,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:07:54,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:07:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2024-11-14 05:07:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815331518] [2024-11-14 05:07:54,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:07:54,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 05:07:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:07:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 05:07:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3619, Unknown=13, NotChecked=124, Total=4160 [2024-11-14 05:07:54,379 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 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 05:08:03,965 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse29 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse28 (* .cse29 8))) (let ((.cse27 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse34 (+ .cse28 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse37 (* (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (.cse31 (select .cse27 .cse34))) (let ((.cse17 (store .cse27 .cse34 (+ .cse37 .cse31))) (.cse35 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse25 (let ((.cse38 (+ (* (mod .cse35 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse17 .cse38 (+ (- 1) .cse37 (select .cse17 .cse38))))) (.cse30 (+ 2 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 (mod (+ c_~N~0 4294967295) 4294967296)))) (.cse6 (+ (* (mod (+ c_~N~0 4294967294) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ (* (mod (+ c_~N~0 4294967293) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (* (- 1) c_~N~0)) (.cse7 (let ((.cse36 (+ (* 8 (mod .cse30 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse25 .cse36 (+ (- 2) (select .cse25 .cse36) .cse37)))) (.cse26 (+ (* |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~i~0#1|) 1)) (.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse33 (not (= c_~N~0 7)))) (and (let ((.cse0 (let ((.cse2 (let ((.cse5 (store .cse7 .cse8 (+ (select .cse7 .cse8) 3 .cse4)))) (store .cse5 .cse6 (+ (select .cse5 .cse6) 2 .cse4))))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1 .cse4))))) (or (not (= c_~N~0 (+ 6 |c_ULTIMATE.start_main_~i~0#1|))) (= 3 (select .cse0 .cse1)) (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse9 (let ((.cse10 (let ((.cse11 (let ((.cse12 (let ((.cse13 (let ((.cse15 (let ((.cse18 (+ (* 8 (mod (+ c_~N~0 4294967290) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse17 .cse18 (+ 6 (select .cse17 .cse18) .cse4)))) (.cse16 (+ (* (mod (+ c_~N~0 4294967291) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse15 .cse16 (+ 5 (select .cse15 .cse16) .cse4)))) (.cse14 (+ (* (mod (+ 4294967292 c_~N~0) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse13 .cse14 (+ 4 (select .cse13 .cse14) .cse4))))) (store .cse12 .cse8 (+ (select .cse12 .cse8) 3 .cse4))))) (store .cse11 .cse6 (+ 2 (select .cse11 .cse6) .cse4))))) (store .cse10 .cse3 (+ (select .cse10 .cse3) 1 .cse4))))) (or (= (select .cse9 .cse1) 3) (not (= 1 (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (= c_~N~0 (+ 7 |c_ULTIMATE.start_main_~i~0#1|))))) (let ((.cse19 (let ((.cse20 (let ((.cse21 (store .cse17 .cse8 (+ 3 (select .cse17 .cse8) .cse4)))) (store .cse21 .cse6 (+ 2 (select .cse21 .cse6) .cse4))))) (store .cse20 .cse3 (+ (select .cse20 .cse3) 1 .cse4))))) (or (not (= (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) (= 3 (select .cse19 .cse1)) (not (= c_~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 4))))) (let ((.cse22 (let ((.cse23 (let ((.cse24 (store .cse25 .cse8 (+ (select .cse25 .cse8) 3 .cse4)))) (store .cse24 .cse6 (+ 2 (select .cse24 .cse6) .cse4))))) (store .cse23 .cse3 (+ (select .cse23 .cse3) 1 .cse4))))) (or (not (= c_~N~0 (+ 5 |c_ULTIMATE.start_main_~i~0#1|))) (= (select .cse22 .cse1) 3) (not (= (select .cse22 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (or (not (= (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) (= 3 (select .cse7 .cse1)) (not (= (+ 3 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0))) (or (= .cse26 (select .cse27 (+ .cse28 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (< .cse29 2147483648)) (or (= (select .cse25 .cse1) 3) (not (= c_~N~0 .cse30)) (not (= (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (or (< 2147483647 .cse29) (= .cse26 .cse31)) (= |c_ULTIMATE.start_main_~i~0#1| 0) (<= 1 c_~N~0) (<= c_~N~0 2147483647) (let ((.cse32 (store .cse27 .cse34 (* .cse35 .cse35)))) (or (not (= (select .cse32 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) (= 4 (select .cse32 .cse1)) .cse33)) (or (= (select .cse27 .cse1) 4) (not (= (select .cse27 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) .cse33))))))))) is different from true [2024-11-14 05:08:39,582 WARN L286 SmtUtils]: Spent 13.28s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:08:47,335 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse36 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse24 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse15 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse16 (+ (* .cse24 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse25 (mod .cse36 4294967296)) (.cse35 (+ 2 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse20 (store (store .cse15 .cse16 (* .cse36 .cse36)) (+ (* .cse25 8) |c_ULTIMATE.start_main_~a~0#1.offset|) (* .cse35 .cse35))) (.cse28 (mod .cse35 4294967296)) (.cse34 (+ 3 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse31 (store .cse20 (+ (* 8 .cse28) |c_ULTIMATE.start_main_~a~0#1.offset|) (* .cse34 .cse34))) (.cse29 (mod .cse34 4294967296)) (.cse33 (+ |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse19 (store .cse31 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* .cse29 8)) (* .cse33 .cse33))) (.cse30 (mod .cse33 4294967296)) (.cse32 (+ 5 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse17 (store .cse19 (+ (* .cse30 8) |c_ULTIMATE.start_main_~a~0#1.offset|) (* .cse32 .cse32))) (.cse22 (mod .cse32 4294967296)) (.cse23 (+ 6 |c_ULTIMATE.start_main_~i~0#1|)) (.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (not (= c_~N~0 7)))) (and (let ((.cse0 (let ((.cse4 (* (- 1) c_~N~0))) (let ((.cse2 (let ((.cse5 (let ((.cse7 (let ((.cse9 (let ((.cse11 (let ((.cse13 (store .cse15 .cse16 (+ (* (- 1) |c_ULTIMATE.start_main_~i~0#1|) (select .cse15 .cse16)))) (.cse14 (+ (* 8 (mod (+ c_~N~0 4294967290) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse13 .cse14 (+ 6 (select .cse13 .cse14) .cse4)))) (.cse12 (+ (* (mod (+ c_~N~0 4294967291) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse11 .cse12 (+ 5 (select .cse11 .cse12) .cse4)))) (.cse10 (+ (* (mod (+ 4294967292 c_~N~0) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse9 .cse10 (+ 4 (select .cse9 .cse10) .cse4)))) (.cse8 (+ (* (mod (+ c_~N~0 4294967293) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse7 .cse8 (+ (select .cse7 .cse8) 3 .cse4)))) (.cse6 (+ (* (mod (+ c_~N~0 4294967294) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse5 .cse6 (+ 2 (select .cse5 .cse6) .cse4)))) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 (mod (+ c_~N~0 4294967295) 4294967296))))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1 .cse4)))))) (or (= (select .cse0 .cse1) 3) (not (= 1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (= c_~N~0 (+ 7 |c_ULTIMATE.start_main_~i~0#1|))))) (or (= (select .cse17 .cse1) 4) .cse18 (not (= (select .cse17 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (or (not (= (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) (= (select .cse19 .cse1) 4) .cse18) (or (= (select .cse20 .cse1) 4) .cse18 (not (= (select .cse20 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (<= c_~N~0 2147483647) (let ((.cse21 (store .cse17 (+ (* .cse22 8) |c_ULTIMATE.start_main_~a~0#1.offset|) (* .cse23 .cse23)))) (or (= (select .cse21 .cse1) 4) .cse18 (not (= (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (or (= (select .cse15 .cse1) 4) (not (= (select .cse15 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) .cse18) (or (= .cse24 0) .cse18 (let ((.cse26 (= .cse24 1)) (.cse27 (* |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~i~0#1|))) (and (or (= .cse25 0) .cse26 (= .cse22 0) (and (not (= (+ 48 .cse27 (* 14 |c_ULTIMATE.start_main_~i~0#1|)) 0)) (or (= (mod .cse23 4294967296) 0) (= .cse28 0))) (= .cse29 0) (= .cse30 0)) (or (not .cse26) (= 3 (+ (* 2 |c_ULTIMATE.start_main_~i~0#1|) .cse27)))))) (or (= (select .cse31 .cse1) 4) (not (= (select .cse31 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) .cse18)))))))) is different from true [2024-11-14 05:08:51,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:08:54,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:08:56,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:08:57,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:08:59,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:09:02,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:16,255 WARN L286 SmtUtils]: Spent 7.09s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:09:23,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:27,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:09:29,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:31,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:34,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:35,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:37,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:09:39,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:42,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:09:56,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:10:03,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 05:12:29,110 WARN L286 SmtUtils]: Spent 1.26m on a formula simplification. DAG size of input: 226 DAG size of output: 215 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:12:32,337 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse11 (* (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (.cse23 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 (mod (+ c_~N~0 4294967295) 4294967296)))) (.cse6 (+ (* (mod (+ c_~N~0 4294967294) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse8 (+ (* (mod (+ c_~N~0 4294967293) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse12 (let ((.cse24 (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse23 .cse24 (+ .cse11 (select .cse23 .cse24))))) (.cse4 (* (- 1) c_~N~0)) (.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (let ((.cse0 (let ((.cse2 (let ((.cse5 (let ((.cse7 (let ((.cse9 (let ((.cse13 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse12 .cse13 (+ (- 1) .cse11 (select .cse12 .cse13))))) (.cse10 (+ (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse9 .cse10 (+ (- 2) (select .cse9 .cse10) .cse11))))) (store .cse7 .cse8 (+ (select .cse7 .cse8) 3 .cse4))))) (store .cse5 .cse6 (+ (select .cse5 .cse6) 2 .cse4))))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1 .cse4))))) (or (not (= c_~N~0 (+ 6 |c_ULTIMATE.start_main_~i~0#1|))) (= 3 (select .cse0 .cse1)) (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse14 (let ((.cse15 (let ((.cse16 (let ((.cse17 (let ((.cse18 (let ((.cse20 (let ((.cse22 (+ (* 8 (mod (+ c_~N~0 4294967290) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse12 .cse22 (+ 6 (select .cse12 .cse22) .cse4)))) (.cse21 (+ (* (mod (+ c_~N~0 4294967291) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse20 .cse21 (+ 5 (select .cse20 .cse21) .cse4)))) (.cse19 (+ (* (mod (+ 4294967292 c_~N~0) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse18 .cse19 (+ 4 (select .cse18 .cse19) .cse4))))) (store .cse17 .cse8 (+ (select .cse17 .cse8) 3 .cse4))))) (store .cse16 .cse6 (+ 2 (select .cse16 .cse6) .cse4))))) (store .cse15 .cse3 (+ (select .cse15 .cse3) 1 .cse4))))) (or (= (select .cse14 .cse1) 3) (not (= 1 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (= c_~N~0 (+ 7 |c_ULTIMATE.start_main_~i~0#1|))))) (= 13 (select .cse23 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (= 21 (select .cse23 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 7 (select .cse23 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 31 (select .cse23 (+ 40 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= (select .cse23 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (<= 7 c_~N~0) (<= c_~N~0 2147483647) (<= |c_ULTIMATE.start_main_~i~0#1| 7) (= 43 (select .cse23 (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= (select .cse23 .cse1) 3)))) is different from true [2024-11-14 05:12:34,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:36,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:38,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:40,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:41,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:43,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:45,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:47,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:49,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:51,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:53,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:55,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:57,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:12:59,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 05:13:01,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []