./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/test27-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/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_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test27-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78863f43fa37191b47f0d738bb1bc2018c82b38cb68dad85c455cdbd7fd69aa4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:48:58,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:48:58,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-13 23:48:58,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:48:58,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:48:58,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:48:58,323 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:48:58,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:48:58,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:48:58,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:48:58,326 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:48:58,327 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:48:58,327 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:48:58,327 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:48:58,327 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:48:58,327 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:48:58,327 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:48:58,327 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:48:58,327 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:48:58,328 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:48:58,328 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:48:58,328 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:48:58,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 23:48:58,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 23:48:58,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:48:58,329 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:48:58,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:48:58,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:48:58,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:48:58,329 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 23:48:58,329 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 23:48:58,329 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 23:48:58,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:48:58,332 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 23:48:58,332 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:48:58,333 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 23:48:58,333 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:48:58,333 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:48:58,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:48:58,333 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:48:58,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:48:58,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:48:58,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:48:58,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:48:58,334 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:48:58,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:48:58,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:48:58,335 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:48:58,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:48:58,335 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_81baa6c9-2d05-4cca-ab90-357e42838004/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 78863f43fa37191b47f0d738bb1bc2018c82b38cb68dad85c455cdbd7fd69aa4 [2024-11-13 23:48:58,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:48:58,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:48:58,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:48:58,690 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:48:58,690 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:48:58,692 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-regression/test27-1.c Unable to find full path for "g++" [2024-11-13 23:49:00,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:49:01,080 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:49:01,085 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/sv-benchmarks/c/ldv-regression/test27-1.c [2024-11-13 23:49:01,097 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data/2c2994060/3bad63494b51402c91c57075dca3a399/FLAG13dcde83d [2024-11-13 23:49:01,384 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data/2c2994060/3bad63494b51402c91c57075dca3a399 [2024-11-13 23:49:01,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:49:01,389 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:49:01,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:49:01,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:49:01,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:49:01,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b4c3b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01, skipping insertion in model container [2024-11-13 23:49:01,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,422 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:49:01,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:49:01,651 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:49:01,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:49:01,691 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:49:01,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01 WrapperNode [2024-11-13 23:49:01,692 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:49:01,693 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:49:01,693 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:49:01,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:49:01,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,729 INFO L138 Inliner]: procedures = 16, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 118 [2024-11-13 23:49:01,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:49:01,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:49:01,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:49:01,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:49:01,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,754 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,755 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:49:01,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:49:01,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:49:01,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:49:01,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (1/1) ... [2024-11-13 23:49:01,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:49:01,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:01,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:49:01,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:49:01,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-13 23:49:01,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:49:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:49:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-13 23:49:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:49:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:49:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:49:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:49:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:49:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:49:01,956 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:49:01,959 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:49:02,442 INFO L? ?]: Removed 96 outVars from TransFormulas that were not future-live. [2024-11-13 23:49:02,442 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:49:02,514 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:49:02,516 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 23:49:02,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:02 BoogieIcfgContainer [2024-11-13 23:49:02,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:49:02,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:49:02,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:49:02,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:49:02,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:49:01" (1/3) ... [2024-11-13 23:49:02,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2681aa1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:02, skipping insertion in model container [2024-11-13 23:49:02,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:49:01" (2/3) ... [2024-11-13 23:49:02,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2681aa1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:02, skipping insertion in model container [2024-11-13 23:49:02,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:02" (3/3) ... [2024-11-13 23:49:02,534 INFO L112 eAbstractionObserver]: Analyzing ICFG test27-1.c [2024-11-13 23:49:02,554 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:49:02,558 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG test27-1.c that has 1 procedures, 67 locations, 1 initial locations, 2 loop locations, and 38 error locations. [2024-11-13 23:49:02,601 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:49:02,614 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=None, 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;@76048972, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:49:02,614 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-13 23:49:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 66 states have internal predecessors, (72), 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) [2024-11-13 23:49:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-13 23:49:02,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:02,626 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-13 23:49:02,627 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:02,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash 145433, now seen corresponding path program 1 times [2024-11-13 23:49:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:02,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036706453] [2024-11-13 23:49:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:02,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:02,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:02,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036706453] [2024-11-13 23:49:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036706453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:02,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:02,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 23:49:02,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986085515] [2024-11-13 23:49:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:02,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:03,062 INFO L87 Difference]: Start difference. First operand has 67 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 66 states have internal predecessors, (72), 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, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:03,223 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2024-11-13 23:49:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:03,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-13 23:49:03,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:03,234 INFO L225 Difference]: With dead ends: 64 [2024-11-13 23:49:03,234 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 23:49:03,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:03,239 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:03,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 26 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 23:49:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-13 23:49:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 28 states have (on average 2.357142857142857) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-11-13 23:49:03,294 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 3 [2024-11-13 23:49:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:03,295 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-11-13 23:49:03,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-11-13 23:49:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-13 23:49:03,295 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:03,295 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-13 23:49:03,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:49:03,296 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:03,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:03,296 INFO L85 PathProgramCache]: Analyzing trace with hash 145434, now seen corresponding path program 1 times [2024-11-13 23:49:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:03,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710693126] [2024-11-13 23:49:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:03,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:03,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:03,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710693126] [2024-11-13 23:49:03,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710693126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:03,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:03,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 23:49:03,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218739999] [2024-11-13 23:49:03,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:03,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:03,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:03,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:03,506 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:03,630 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-13 23:49:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-13 23:49:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:03,632 INFO L225 Difference]: With dead ends: 67 [2024-11-13 23:49:03,632 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 23:49:03,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:03,633 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:03,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 23:49:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-11-13 23:49:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 64 states have internal predecessors, (68), 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) [2024-11-13 23:49:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-11-13 23:49:03,641 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 3 [2024-11-13 23:49:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:03,641 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-11-13 23:49:03,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-11-13 23:49:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:49:03,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:03,642 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:49:03,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:49:03,643 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:03,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 4511725, now seen corresponding path program 1 times [2024-11-13 23:49:03,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:03,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714462622] [2024-11-13 23:49:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:03,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:03,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:03,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714462622] [2024-11-13 23:49:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714462622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:03,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:03,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:49:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724422158] [2024-11-13 23:49:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:03,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:03,802 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:03,915 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2024-11-13 23:49:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:03,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 23:49:03,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:03,917 INFO L225 Difference]: With dead ends: 62 [2024-11-13 23:49:03,917 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 23:49:03,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:03,919 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:03,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 26 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 23:49:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-13 23:49:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 61 states have internal predecessors, (65), 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) [2024-11-13 23:49:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2024-11-13 23:49:03,927 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 4 [2024-11-13 23:49:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:03,927 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2024-11-13 23:49:03,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2024-11-13 23:49:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:49:03,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:03,928 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:49:03,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:49:03,929 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:03,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash 4511726, now seen corresponding path program 1 times [2024-11-13 23:49:03,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:03,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332219069] [2024-11-13 23:49:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:03,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:04,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:04,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332219069] [2024-11-13 23:49:04,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332219069] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:04,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:04,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:49:04,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656569493] [2024-11-13 23:49:04,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:04,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:04,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:04,155 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:04,303 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2024-11-13 23:49:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-13 23:49:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:04,305 INFO L225 Difference]: With dead ends: 63 [2024-11-13 23:49:04,305 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 23:49:04,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:04,306 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:04,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 23:49:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-13 23:49:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 31 states have (on average 2.129032258064516) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-11-13 23:49:04,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 4 [2024-11-13 23:49:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:04,314 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-11-13 23:49:04,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-11-13 23:49:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 23:49:04,315 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:04,315 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 23:49:04,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 23:49:04,316 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:04,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 40901657, now seen corresponding path program 1 times [2024-11-13 23:49:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:04,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496854002] [2024-11-13 23:49:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:04,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:04,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496854002] [2024-11-13 23:49:04,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496854002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:04,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780489290] [2024-11-13 23:49:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:04,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:04,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:04,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:49:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:04,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 23:49:04,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:04,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 23:49:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:04,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:04,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780489290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294584224] [2024-11-13 23:49:04,920 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-13 23:49:04,920 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:04,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:04,931 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:04,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:06,575 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:07,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '630#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_23| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_26| Int) (|v_ULTIMATE.start_main_~j~0#1_32| Int)) (and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |v_ULTIMATE.start_main_~#a~0#1.offset_23| 0) (<= 2 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= (select |#length| |v_ULTIMATE.start_main_~#a~0#1.base_26|) (+ 3 (* |v_ULTIMATE.start_main_~j~0#1_32| 4))) (<= 2 |v_ULTIMATE.start_main_~#a~0#1.base_26|) (<= 2 |ULTIMATE.start_main_~#cont~0#1.base|) (<= |v_ULTIMATE.start_main_~j~0#1_32| 9) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~j~0#1_32|))) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet9#1|)) (<= |ULTIMATE.start_main_#t~nondet9#1| 2147483647))' at error location [2024-11-13 23:49:07,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:07,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:07,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-13 23:49:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465407580] [2024-11-13 23:49:07,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:07,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:49:07,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:49:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-13 23:49:07,349 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:07,611 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2024-11-13 23:49:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:49:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 23:49:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:07,616 INFO L225 Difference]: With dead ends: 71 [2024-11-13 23:49:07,616 INFO L226 Difference]: Without dead ends: 71 [2024-11-13 23:49:07,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:49:07,617 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:07,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-13 23:49:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-13 23:49:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 2.0) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2024-11-13 23:49:07,629 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 6 [2024-11-13 23:49:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:07,629 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2024-11-13 23:49:07,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2024-11-13 23:49:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 23:49:07,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:07,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-13 23:49:07,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:49:07,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:07,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:07,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:07,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1267954639, now seen corresponding path program 1 times [2024-11-13 23:49:07,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:07,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659779129] [2024-11-13 23:49:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:07,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:08,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659779129] [2024-11-13 23:49:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659779129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598089057] [2024-11-13 23:49:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:08,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:08,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:08,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:49:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:08,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 23:49:08,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:08,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-13 23:49:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:08,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598089057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819370327] [2024-11-13 23:49:08,613 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-13 23:49:08,614 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:08,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:08,614 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:08,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:10,123 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:10,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '823#(and (exists ((|v_ULTIMATE.start_main_~j~0#1_38| Int) (|v_ULTIMATE.start_main_~#dummies~0#1.base_26| Int) (|v_#memory_$Pointer$.base_49| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_49| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#dummies~0#1.offset_23| Int) (|v_#memory_int_50| (Array Int (Array Int Int)))) (and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4)) 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |#memory_int| (store |v_#memory_int_50| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_int_50| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4))))) (<= 2 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (= |v_ULTIMATE.start_main_~#dummies~0#1.offset_23| 0) (= (store |v_#memory_$Pointer$.base_49| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.base_49| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4)))) |#memory_$Pointer$.base|) (<= (+ (* |v_ULTIMATE.start_main_~j~0#1_38| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 2 |ULTIMATE.start_main_~#cont~0#1.base|) (<= 2 |v_ULTIMATE.start_main_~#dummies~0#1.base_26|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4)) 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (<= |v_ULTIMATE.start_main_~j~0#1_38| 9) (<= 0 |v_ULTIMATE.start_main_~j~0#1_38|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_49| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.offset_49| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_38| 4))))) (<= (select |#length| |v_ULTIMATE.start_main_~#dummies~0#1.base_26|) (+ (* |v_ULTIMATE.start_main_~j~0#1_38| 4) 3)))) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1))' at error location [2024-11-13 23:49:10,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:10,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:10,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-13 23:49:10,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683625423] [2024-11-13 23:49:10,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:10,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:49:10,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:10,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:49:10,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-13 23:49:10,949 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-11-13 23:49:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:11,299 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-11-13 23:49:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:49:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 23:49:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:11,301 INFO L225 Difference]: With dead ends: 72 [2024-11-13 23:49:11,301 INFO L226 Difference]: Without dead ends: 72 [2024-11-13 23:49:11,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:49:11,302 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:11,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 142 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:49:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-13 23:49:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-13 23:49:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 40 states have (on average 1.925) internal successors, (77), 71 states have internal predecessors, (77), 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) [2024-11-13 23:49:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2024-11-13 23:49:11,318 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 7 [2024-11-13 23:49:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:11,318 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2024-11-13 23:49:11,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-11-13 23:49:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2024-11-13 23:49:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 23:49:11,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:11,319 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-13 23:49:11,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 23:49:11,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 23:49:11,519 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:11,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash -597496757, now seen corresponding path program 1 times [2024-11-13 23:49:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:11,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28203114] [2024-11-13 23:49:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:11,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:49:11,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:11,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28203114] [2024-11-13 23:49:11,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28203114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:11,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:11,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:49:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056946361] [2024-11-13 23:49:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:11,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:11,675 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:11,815 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-11-13 23:49:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:11,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 23:49:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:11,816 INFO L225 Difference]: With dead ends: 71 [2024-11-13 23:49:11,816 INFO L226 Difference]: Without dead ends: 71 [2024-11-13 23:49:11,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:49:11,817 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 20 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:11,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 65 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-13 23:49:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-13 23:49:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.875) internal successors, (75), 69 states have internal predecessors, (75), 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) [2024-11-13 23:49:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2024-11-13 23:49:11,822 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 10 [2024-11-13 23:49:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:11,822 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2024-11-13 23:49:11,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2024-11-13 23:49:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 23:49:11,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:11,823 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-11-13 23:49:11,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 23:49:11,823 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:11,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1342452825, now seen corresponding path program 1 times [2024-11-13 23:49:11,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:11,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002506697] [2024-11-13 23:49:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:11,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002506697] [2024-11-13 23:49:11,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002506697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232658508] [2024-11-13 23:49:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:11,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:11,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:11,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:11,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:49:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:12,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:49:12,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:12,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232658508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939179119] [2024-11-13 23:49:12,140 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:49:12,141 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:12,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:12,142 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:12,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:13,222 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:13,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1189#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (exists ((|v_ULTIMATE.start_main_~i~0#1_29| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_29| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~i~0#1_29| 2147483648)) (or (< 8 |v_ULTIMATE.start_main_~i~0#1_29|) (< |v_ULTIMATE.start_main_~i~0#1_29| 1)))) (exists ((|v_ULTIMATE.start_main_~#cont~0#1.base_21| Int) (|v_#valid_78| (Array Int Int)) (|v_ULTIMATE.start_main_~#a~0#1.base_27| Int) (|v_ULTIMATE.start_main_~#dummies~0#1.base_27| Int) (|v_ULTIMATE.start_main_~#dummy~0#1.base_18| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#a~0#1.base_27|) (<= 2 |v_ULTIMATE.start_main_~#dummies~0#1.base_27|) (<= 2 |v_ULTIMATE.start_main_~#cont~0#1.base_21|) (<= 2 |v_ULTIMATE.start_main_~#dummy~0#1.base_18|) (= (store (store (store (store |v_#valid_78| |v_ULTIMATE.start_main_~#cont~0#1.base_21| 0) |v_ULTIMATE.start_main_~#dummy~0#1.base_18| 0) |v_ULTIMATE.start_main_~#dummies~0#1.base_27| 0) |v_ULTIMATE.start_main_~#a~0#1.base_27| 0) |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-13 23:49:13,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:13,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:13,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-13 23:49:13,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093933872] [2024-11-13 23:49:13,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:13,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:49:13,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:13,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:49:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:49:13,891 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2024-11-13 23:49:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:14,006 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-11-13 23:49:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:49:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) Word has length 11 [2024-11-13 23:49:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:14,008 INFO L225 Difference]: With dead ends: 74 [2024-11-13 23:49:14,008 INFO L226 Difference]: Without dead ends: 74 [2024-11-13 23:49:14,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:49:14,010 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:14,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 250 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-13 23:49:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-13 23:49:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 73 states have internal predecessors, (79), 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) [2024-11-13 23:49:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2024-11-13 23:49:14,021 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 11 [2024-11-13 23:49:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:14,021 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2024-11-13 23:49:14,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2024-11-13 23:49:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2024-11-13 23:49:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 23:49:14,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:14,026 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1] [2024-11-13 23:49:14,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:49:14,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:14,227 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:14,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash 633149274, now seen corresponding path program 2 times [2024-11-13 23:49:14,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:14,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109469974] [2024-11-13 23:49:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:14,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:14,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:14,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109469974] [2024-11-13 23:49:14,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109469974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:14,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203092706] [2024-11-13 23:49:14,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:49:14,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:14,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:14,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:14,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:49:14,684 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:49:14,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:49:14,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 23:49:14,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:14,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:49:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 23:49:14,879 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:49:14,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203092706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:14,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:49:14,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-13 23:49:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116817172] [2024-11-13 23:49:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:14,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:49:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:49:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-13 23:49:14,882 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2024-11-13 23:49:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:15,028 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2024-11-13 23:49:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:49:15,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 15 [2024-11-13 23:49:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:15,029 INFO L225 Difference]: With dead ends: 74 [2024-11-13 23:49:15,030 INFO L226 Difference]: Without dead ends: 74 [2024-11-13 23:49:15,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-13 23:49:15,030 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:15,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 73 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-13 23:49:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-13 23:49:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 44 states have (on average 1.75) internal successors, (77), 72 states have internal predecessors, (77), 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) [2024-11-13 23:49:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2024-11-13 23:49:15,037 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 15 [2024-11-13 23:49:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:15,038 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2024-11-13 23:49:15,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2024-11-13 23:49:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2024-11-13 23:49:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 23:49:15,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:15,038 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1] [2024-11-13 23:49:15,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 23:49:15,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:15,239 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:15,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1847205714, now seen corresponding path program 2 times [2024-11-13 23:49:15,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:15,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514905127] [2024-11-13 23:49:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:15,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:15,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514905127] [2024-11-13 23:49:15,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514905127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:15,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245239780] [2024-11-13 23:49:15,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:49:15,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:15,724 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:49:15,818 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 23:49:15,819 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:49:15,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:49:15,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:15,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 23:49:15,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-13 23:49:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 23:49:16,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 23:49:16,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245239780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:16,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527159006] [2024-11-13 23:49:16,526 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-13 23:49:16,527 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:16,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:16,528 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:16,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:17,576 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:18,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1647#(and (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (exists ((|v_#memory_$Pointer$.base_76| (Array Int (Array Int Int))) (|v_#memory_int_77| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_76| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#dummies~0#1.offset_26| Int) (|v_ULTIMATE.start_main_~#dummies~0#1.base_28| Int) (|v_ULTIMATE.start_main_~j~0#1_56| Int)) (and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_main_~#dummies~0#1.base_28|) (+ 3 (* |v_ULTIMATE.start_main_~j~0#1_56| 4))) (<= 1 |#StackHeapBarrier|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_76| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.offset_76| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4))))) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |v_ULTIMATE.start_main_~j~0#1_56| 9) (= |v_ULTIMATE.start_main_~#dummies~0#1.offset_26| 0) (<= 2 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= (+ (* |v_ULTIMATE.start_main_~j~0#1_56| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 2 |ULTIMATE.start_main_~#cont~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~j~0#1_56|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |#memory_int| (store |v_#memory_int_77| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_int_77| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4))))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_76| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.base_76| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4))))) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4)) 2147483648)) (<= 2 |v_ULTIMATE.start_main_~#dummies~0#1.base_28|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~j~0#1_56| 4)) 2147483647))))' at error location [2024-11-13 23:49:18,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:18,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2024-11-13 23:49:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404184829] [2024-11-13 23:49:18,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:18,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 23:49:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 23:49:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=244, Unknown=1, NotChecked=0, Total=306 [2024-11-13 23:49:18,246 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2024-11-13 23:49:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:18,817 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2024-11-13 23:49:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:49:18,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 16 [2024-11-13 23:49:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:18,818 INFO L225 Difference]: With dead ends: 74 [2024-11-13 23:49:18,818 INFO L226 Difference]: Without dead ends: 74 [2024-11-13 23:49:18,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=431, Unknown=1, NotChecked=0, Total=552 [2024-11-13 23:49:18,819 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:18,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 190 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 23:49:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-13 23:49:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-11-13 23:49:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 71 states have internal predecessors, (75), 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) [2024-11-13 23:49:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2024-11-13 23:49:18,824 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 16 [2024-11-13 23:49:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:18,824 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2024-11-13 23:49:18,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2024-11-13 23:49:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2024-11-13 23:49:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 23:49:18,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:18,825 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2024-11-13 23:49:18,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:49:19,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 23:49:19,030 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:19,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 696478439, now seen corresponding path program 2 times [2024-11-13 23:49:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:19,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323678896] [2024-11-13 23:49:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:19,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:19,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:19,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323678896] [2024-11-13 23:49:19,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323678896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:19,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673916644] [2024-11-13 23:49:19,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:49:19,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:19,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:19,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:19,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:49:19,452 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 23:49:19,452 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:49:19,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 23:49:19,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:19,959 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_28| Int) (|v_ULTIMATE.start_main_~#cont~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#dummies~0#1.base_29| Int) (|v_ULTIMATE.start_main_~#dummy~0#1.base_19| Int)) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#cont~0#1.base_22| 1))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_main_~#dummy~0#1.base_19| 1))) (and (= (select .cse0 |v_ULTIMATE.start_main_~#dummies~0#1.base_29|) 0) (= (select .cse1 |v_ULTIMATE.start_main_~#dummy~0#1.base_19|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#cont~0#1.base_22|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#cont~0#1.base_22| 0) |v_ULTIMATE.start_main_~#dummy~0#1.base_19| 0) |v_ULTIMATE.start_main_~#dummies~0#1.base_29| 0) |v_ULTIMATE.start_main_~#a~0#1.base_28| 0)) (= (select (store .cse0 |v_ULTIMATE.start_main_~#dummies~0#1.base_29| 1) |v_ULTIMATE.start_main_~#a~0#1.base_28|) 0))))) is different from true [2024-11-13 23:49:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 23:49:19,960 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:49:19,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673916644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:19,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:49:19,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-11-13 23:49:19,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116747726] [2024-11-13 23:49:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:19,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:49:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:49:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2024-11-13 23:49:19,962 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 4 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) [2024-11-13 23:49:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:20,077 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2024-11-13 23:49:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:49:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 23 [2024-11-13 23:49:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:20,079 INFO L225 Difference]: With dead ends: 68 [2024-11-13 23:49:20,079 INFO L226 Difference]: Without dead ends: 66 [2024-11-13 23:49:20,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2024-11-13 23:49:20,080 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:20,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 18 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2024-11-13 23:49:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-13 23:49:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-13 23:49:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-11-13 23:49:20,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 23 [2024-11-13 23:49:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:20,087 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-11-13 23:49:20,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2024-11-13 23:49:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-11-13 23:49:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 23:49:20,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:20,088 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2024-11-13 23:49:20,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:49:20,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:20,292 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:20,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:20,293 INFO L85 PathProgramCache]: Analyzing trace with hash 696400950, now seen corresponding path program 1 times [2024-11-13 23:49:20,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:20,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761250888] [2024-11-13 23:49:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:20,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:20,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761250888] [2024-11-13 23:49:20,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761250888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:20,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859195472] [2024-11-13 23:49:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:20,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:20,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:20,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:20,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:49:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:20,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 23:49:20,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:20,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:20,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859195472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:20,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280690280] [2024-11-13 23:49:20,902 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:49:20,903 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:20,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:20,903 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:20,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:21,907 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:22,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2165#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~#dummy~0#1.base_20| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#dummy~0#1.base_20|) (<= (select |#length| |v_ULTIMATE.start_main_~#dummy~0#1.base_20|) 3))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 8) (exists ((|v_#memory_$Pointer$.base_96| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_96| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.base_96| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_96| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4)))))) (<= 2 |ULTIMATE.start_main_~#cont~0#1.base|) (<= (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (exists ((|v_#memory_int_97| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_97| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_int_97| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~i~0#1|)))))' at error location [2024-11-13 23:49:22,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:22,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:22,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-13 23:49:22,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219388550] [2024-11-13 23:49:22,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:22,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 23:49:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 23:49:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-13 23:49:22,581 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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) [2024-11-13 23:49:22,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:22,676 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2024-11-13 23:49:22,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 23:49:22,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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 [2024-11-13 23:49:22,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:22,677 INFO L225 Difference]: With dead ends: 78 [2024-11-13 23:49:22,677 INFO L226 Difference]: Without dead ends: 78 [2024-11-13 23:49:22,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-13 23:49:22,679 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:22,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 168 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-13 23:49:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-13 23:49:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.462962962962963) internal successors, (79), 77 states have internal predecessors, (79), 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) [2024-11-13 23:49:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-11-13 23:49:22,689 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 23 [2024-11-13 23:49:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:22,690 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-11-13 23:49:22,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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) [2024-11-13 23:49:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-11-13 23:49:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 23:49:22,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:22,695 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2024-11-13 23:49:22,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:49:22,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:22,895 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:22,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1839924362, now seen corresponding path program 2 times [2024-11-13 23:49:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:22,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766934798] [2024-11-13 23:49:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:23,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:23,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766934798] [2024-11-13 23:49:23,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766934798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:23,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:23,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 23:49:23,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25035410] [2024-11-13 23:49:23,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:23,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:23,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:23,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:23,483 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2024-11-13 23:49:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:23,560 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2024-11-13 23:49:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 35 [2024-11-13 23:49:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:23,562 INFO L225 Difference]: With dead ends: 77 [2024-11-13 23:49:23,562 INFO L226 Difference]: Without dead ends: 77 [2024-11-13 23:49:23,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:49:23,562 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:23,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 52 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-13 23:49:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-13 23:49:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2024-11-13 23:49:23,567 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 35 [2024-11-13 23:49:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:23,567 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2024-11-13 23:49:23,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2024-11-13 23:49:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2024-11-13 23:49:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 23:49:23,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:23,568 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:23,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 23:49:23,569 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:23,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1203080402, now seen corresponding path program 1 times [2024-11-13 23:49:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447497064] [2024-11-13 23:49:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:24,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:24,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447497064] [2024-11-13 23:49:24,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447497064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:24,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096406719] [2024-11-13 23:49:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:24,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:24,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:24,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:24,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:49:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:24,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 23:49:24,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:24,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:24,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2024-11-13 23:49:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:25,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096406719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571085093] [2024-11-13 23:49:25,268 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-13 23:49:25,268 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:25,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:25,269 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:25,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:25,858 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:26,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2733#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#dummies~0#1.base_30| Int) (|v_#memory_$Pointer$.offset_127| (Array Int (Array Int Int))) (|v_#memory_int_127| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_127| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~i~0#1_30| Int)) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_127| |ULTIMATE.start_main_~#dummy~0#1.base| (store (select |v_#memory_$Pointer$.offset_127| |ULTIMATE.start_main_~#dummy~0#1.base|) 0 (+ (* |v_ULTIMATE.start_main_~i~0#1_30| 4) (- 4))))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_127| |ULTIMATE.start_main_~#dummy~0#1.base| (store (select |v_#memory_$Pointer$.base_127| |ULTIMATE.start_main_~#dummy~0#1.base|) 0 |ULTIMATE.start_main_~#a~0#1.base|))) (<= (+ (* |v_ULTIMATE.start_main_~i~0#1_30| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (= (store (store |v_#memory_int_127| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_int_127| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_30| 4) |v_ULTIMATE.start_main_~i~0#1_30|)) |ULTIMATE.start_main_~#dummy~0#1.base| (store (select (store |v_#memory_int_127| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_int_127| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_30| 4) |v_ULTIMATE.start_main_~i~0#1_30|)) |ULTIMATE.start_main_~#dummy~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_main_~#dummy~0#1.base|) 0))) |#memory_int|) (<= |v_ULTIMATE.start_main_~i~0#1_30| 8) (<= (select |#length| |v_ULTIMATE.start_main_~#dummies~0#1.base_30|) (+ 7 (* |v_ULTIMATE.start_main_~i~0#1_30| 4))) (<= 2 |v_ULTIMATE.start_main_~#dummies~0#1.base_30|) (<= 1 |v_ULTIMATE.start_main_~i~0#1_30|) (= (store |v_#memory_$Pointer$.base_126| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.base_126| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_30| 4) (select (select |v_#memory_$Pointer$.base_127| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_30| 4)))) |v_#memory_$Pointer$.base_127|) (= (store |v_#memory_$Pointer$.offset_126| |ULTIMATE.start_main_~#a~0#1.base| (store (select |v_#memory_$Pointer$.offset_126| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_30| 4) (select (select |v_#memory_$Pointer$.offset_127| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_30| 4)))) |v_#memory_$Pointer$.offset_127|))) (<= 1 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~#dummy~0#1.base|) 1) (<= 2 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 2 |ULTIMATE.start_main_~#cont~0#1.base|) (<= 4 (select |#length| |ULTIMATE.start_main_~#dummy~0#1.base|)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1))' at error location [2024-11-13 23:49:26,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:26,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:26,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2024-11-13 23:49:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76231624] [2024-11-13 23:49:26,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:26,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 23:49:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 23:49:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1666, Unknown=1, NotChecked=0, Total=2070 [2024-11-13 23:49:26,952 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 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) [2024-11-13 23:49:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:27,542 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2024-11-13 23:49:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 23:49:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 23:49:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:27,543 INFO L225 Difference]: With dead ends: 75 [2024-11-13 23:49:27,543 INFO L226 Difference]: Without dead ends: 75 [2024-11-13 23:49:27,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=653, Invalid=2538, Unknown=1, NotChecked=0, Total=3192 [2024-11-13 23:49:27,545 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:27,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 235 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:49:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-13 23:49:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-13 23:49:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 74 states have internal predecessors, (76), 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) [2024-11-13 23:49:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-11-13 23:49:27,551 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 36 [2024-11-13 23:49:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:27,552 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-11-13 23:49:27,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 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) [2024-11-13 23:49:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-11-13 23:49:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 23:49:27,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:27,554 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:27,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 23:49:27,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:27,755 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:27,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1359213177, now seen corresponding path program 1 times [2024-11-13 23:49:27,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:27,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512484148] [2024-11-13 23:49:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:27,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:29,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512484148] [2024-11-13 23:49:29,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512484148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440154449] [2024-11-13 23:49:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:29,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:29,415 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:29,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:49:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:29,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 23:49:29,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:29,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-13 23:49:29,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:49:29,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 23:49:29,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:49:29,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-13 23:49:29,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:49:29,794 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-13 23:49:29,803 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-13 23:49:29,810 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-13 23:49:29,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-13 23:49:29,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:29,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 23:49:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:30,605 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:49:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440154449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:30,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:49:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [13] total 14 [2024-11-13 23:49:30,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381700979] [2024-11-13 23:49:30,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:30,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:49:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:49:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-13 23:49:30,606 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:30,676 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-11-13 23:49:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:49:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-13 23:49:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:30,677 INFO L225 Difference]: With dead ends: 73 [2024-11-13 23:49:30,677 INFO L226 Difference]: Without dead ends: 73 [2024-11-13 23:49:30,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-13 23:49:30,677 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:30,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-13 23:49:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-13 23:49:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 72 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) [2024-11-13 23:49:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-11-13 23:49:30,686 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 37 [2024-11-13 23:49:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:30,686 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-11-13 23:49:30,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-11-13 23:49:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 23:49:30,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:30,687 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:30,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 23:49:30,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:30,888 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:30,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash 533804411, now seen corresponding path program 1 times [2024-11-13 23:49:30,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:30,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758107426] [2024-11-13 23:49:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:30,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-13 23:49:31,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758107426] [2024-11-13 23:49:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758107426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:31,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:31,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:49:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74844328] [2024-11-13 23:49:31,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:31,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:49:31,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:49:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:49:31,138 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:31,241 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2024-11-13 23:49:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:49:31,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-13 23:49:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:31,243 INFO L225 Difference]: With dead ends: 72 [2024-11-13 23:49:31,243 INFO L226 Difference]: Without dead ends: 72 [2024-11-13 23:49:31,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:49:31,243 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:31,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-13 23:49:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-13 23:49:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 71 states have internal predecessors, (73), 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) [2024-11-13 23:49:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-11-13 23:49:31,247 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 39 [2024-11-13 23:49:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:31,247 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-11-13 23:49:31,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-11-13 23:49:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 23:49:31,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:31,248 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:31,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 23:49:31,248 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:31,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:31,249 INFO L85 PathProgramCache]: Analyzing trace with hash 533804412, now seen corresponding path program 1 times [2024-11-13 23:49:31,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:31,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759714797] [2024-11-13 23:49:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:31,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:32,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:32,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759714797] [2024-11-13 23:49:32,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759714797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:32,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780288919] [2024-11-13 23:49:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:32,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:32,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:32,049 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:32,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:49:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:32,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 23:49:32,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:32,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-13 23:49:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:32,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 23:49:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:32,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:32,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-13 23:49:32,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 23:49:32,411 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,412 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:49:32,429 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-13 23:49:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:49:32,442 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-13 23:49:32,445 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,456 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-13 23:49:32,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 23:49:32,466 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-13 23:49:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,473 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,473 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:49:32,693 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 15 treesize of output 1 [2024-11-13 23:49:32,697 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 [2024-11-13 23:49:32,738 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 17 treesize of output 9 [2024-11-13 23:49:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:32,771 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:49:32,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780288919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:32,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:49:32,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 17 [2024-11-13 23:49:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196519717] [2024-11-13 23:49:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:32,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:49:32,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:49:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-11-13 23:49:32,772 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:32,934 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-11-13 23:49:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:49:32,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-13 23:49:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:32,935 INFO L225 Difference]: With dead ends: 71 [2024-11-13 23:49:32,935 INFO L226 Difference]: Without dead ends: 71 [2024-11-13 23:49:32,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-11-13 23:49:32,936 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:32,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 59 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-13 23:49:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-13 23:49:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 70 states have internal predecessors, (72), 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) [2024-11-13 23:49:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-11-13 23:49:32,939 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 39 [2024-11-13 23:49:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:32,940 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-11-13 23:49:32,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-11-13 23:49:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:49:32,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:32,941 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:32,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:49:33,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 23:49:33,143 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:33,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash -631932429, now seen corresponding path program 1 times [2024-11-13 23:49:33,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:33,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341798521] [2024-11-13 23:49:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:33,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:49:37,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:37,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341798521] [2024-11-13 23:49:37,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341798521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:37,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055765925] [2024-11-13 23:49:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:37,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:37,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:37,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:37,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:49:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:37,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 23:49:37,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:37,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 12 [2024-11-13 23:49:37,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-13 23:49:37,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 33 [2024-11-13 23:49:37,842 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 15 treesize of output 1 [2024-11-13 23:49:37,893 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 53 treesize of output 41 [2024-11-13 23:49:37,958 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-13 23:49:37,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 20 [2024-11-13 23:49:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:37,962 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:49:37,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055765925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:37,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:49:37,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 20 [2024-11-13 23:49:37,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923464151] [2024-11-13 23:49:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:37,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:49:37,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:49:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2024-11-13 23:49:37,964 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-11-13 23:49:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:38,313 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-11-13 23:49:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:49:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 40 [2024-11-13 23:49:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:38,315 INFO L225 Difference]: With dead ends: 70 [2024-11-13 23:49:38,315 INFO L226 Difference]: Without dead ends: 70 [2024-11-13 23:49:38,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-11-13 23:49:38,316 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:38,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-13 23:49:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-13 23:49:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-13 23:49:38,320 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 40 [2024-11-13 23:49:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:38,320 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-13 23:49:38,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-11-13 23:49:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-13 23:49:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:49:38,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:38,324 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:38,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 23:49:38,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 23:49:38,528 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:38,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -631932428, now seen corresponding path program 1 times [2024-11-13 23:49:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009939005] [2024-11-13 23:49:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 23:49:45,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009939005] [2024-11-13 23:49:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009939005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673443706] [2024-11-13 23:49:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:45,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:45,156 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:45,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 23:49:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:45,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 23:49:45,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:45,476 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 23:49:45,476 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 90 treesize of output 87 [2024-11-13 23:49:46,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-13 23:49:46,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-13 23:49:46,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 47 [2024-11-13 23:49:46,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 46 [2024-11-13 23:49:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:49:46,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:49:46,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 64 [2024-11-13 23:49:46,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 24 [2024-11-13 23:49:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:46,416 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:49:46,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673443706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:46,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:49:46,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 22 [2024-11-13 23:49:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497466240] [2024-11-13 23:49:46,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:46,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:49:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:49:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2024-11-13 23:49:46,418 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2024-11-13 23:49:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:46,889 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2024-11-13 23:49:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:49:46,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 40 [2024-11-13 23:49:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:46,890 INFO L225 Difference]: With dead ends: 69 [2024-11-13 23:49:46,890 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 23:49:46,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2024-11-13 23:49:46,890 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:46,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 93 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 23:49:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-13 23:49:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 68 states have internal predecessors, (70), 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) [2024-11-13 23:49:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-11-13 23:49:46,893 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 40 [2024-11-13 23:49:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:46,894 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-11-13 23:49:46,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2024-11-13 23:49:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-11-13 23:49:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 23:49:46,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:46,895 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:46,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 23:49:47,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:47,095 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:47,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:47,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1652208454, now seen corresponding path program 1 times [2024-11-13 23:49:47,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:47,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538261766] [2024-11-13 23:49:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:47,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:47,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538261766] [2024-11-13 23:49:47,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538261766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:47,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:47,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 23:49:47,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156079535] [2024-11-13 23:49:47,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:47,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:49:47,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:49:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-13 23:49:47,737 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 9 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) [2024-11-13 23:49:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:47,911 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2024-11-13 23:49:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:49:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 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 44 [2024-11-13 23:49:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:47,912 INFO L225 Difference]: With dead ends: 68 [2024-11-13 23:49:47,912 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 23:49:47,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-11-13 23:49:47,913 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:47,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 23:49:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-13 23:49:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-11-13 23:49:47,916 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 44 [2024-11-13 23:49:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:47,917 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-11-13 23:49:47,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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) [2024-11-13 23:49:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-11-13 23:49:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 23:49:47,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:47,918 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:47,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 23:49:47,918 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:47,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:47,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1652208455, now seen corresponding path program 1 times [2024-11-13 23:49:47,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:47,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936312128] [2024-11-13 23:49:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:47,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:48,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:48,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936312128] [2024-11-13 23:49:48,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936312128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:48,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:48,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 23:49:48,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381684813] [2024-11-13 23:49:48,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:48,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:49:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:49:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-13 23:49:48,723 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 9 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) [2024-11-13 23:49:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:48,879 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-11-13 23:49:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:49:48,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 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 44 [2024-11-13 23:49:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:48,881 INFO L225 Difference]: With dead ends: 67 [2024-11-13 23:49:48,881 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 23:49:48,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 23:49:48,884 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:48,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:49:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 23:49:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-13 23:49:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 66 states have internal predecessors, (68), 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) [2024-11-13 23:49:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2024-11-13 23:49:48,888 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 44 [2024-11-13 23:49:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:48,889 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2024-11-13 23:49:48,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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) [2024-11-13 23:49:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2024-11-13 23:49:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 23:49:48,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:48,890 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:48,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 23:49:48,890 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:48,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash -321145448, now seen corresponding path program 1 times [2024-11-13 23:49:48,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:48,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146508667] [2024-11-13 23:49:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:48,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-13 23:49:49,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146508667] [2024-11-13 23:49:49,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146508667] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:49,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:49,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 23:49:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004548977] [2024-11-13 23:49:49,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:49,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 23:49:49,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 23:49:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:49:49,945 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:50,300 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2024-11-13 23:49:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:49:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-13 23:49:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:50,301 INFO L225 Difference]: With dead ends: 66 [2024-11-13 23:49:50,301 INFO L226 Difference]: Without dead ends: 66 [2024-11-13 23:49:50,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-13 23:49:50,303 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:50,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-13 23:49:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-13 23:49:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-11-13 23:49:50,306 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 45 [2024-11-13 23:49:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:50,307 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-11-13 23:49:50,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-11-13 23:49:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 23:49:50,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:50,307 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:50,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 23:49:50,308 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:50,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -321145447, now seen corresponding path program 1 times [2024-11-13 23:49:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:50,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345824556] [2024-11-13 23:49:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:49:51,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:51,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345824556] [2024-11-13 23:49:51,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345824556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:49:51,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:49:51,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 23:49:51,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454670618] [2024-11-13 23:49:51,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:49:51,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 23:49:51,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 23:49:51,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:49:51,747 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:52,152 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2024-11-13 23:49:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 23:49:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-13 23:49:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:52,153 INFO L225 Difference]: With dead ends: 65 [2024-11-13 23:49:52,153 INFO L226 Difference]: Without dead ends: 65 [2024-11-13 23:49:52,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-13 23:49:52,154 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:52,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 85 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:49:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-13 23:49:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-13 23:49:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-11-13 23:49:52,156 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 45 [2024-11-13 23:49:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:52,157 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-11-13 23:49:52,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-11-13 23:49:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 23:49:52,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:52,158 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:52,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-13 23:49:52,158 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:49:52,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1365572306, now seen corresponding path program 1 times [2024-11-13 23:49:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:52,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221910878] [2024-11-13 23:49:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:52,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:50:00,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:00,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221910878] [2024-11-13 23:50:00,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221910878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:00,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259868376] [2024-11-13 23:50:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:00,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:00,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:00,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:00,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 23:50:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:00,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 23:50:00,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:00,545 INFO L349 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2024-11-13 23:50:00,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 35 treesize of output 34 [2024-11-13 23:50:00,638 INFO L349 Elim1Store]: treesize reduction 91, result has 10.8 percent of original size [2024-11-13 23:50:00,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 34 [2024-11-13 23:50:01,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:50:01,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 31 [2024-11-13 23:50:01,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-13 23:50:01,589 INFO L349 Elim1Store]: treesize reduction 117, result has 16.4 percent of original size [2024-11-13 23:50:01,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 68 [2024-11-13 23:50:01,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 48 [2024-11-13 23:50:01,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 103 [2024-11-13 23:50:02,056 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:50:02,069 INFO L349 Elim1Store]: treesize reduction 61, result has 4.7 percent of original size [2024-11-13 23:50:02,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 35 [2024-11-13 23:50:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:50:02,206 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:50:02,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259868376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:02,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:50:02,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [23] total 30 [2024-11-13 23:50:02,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236902682] [2024-11-13 23:50:02,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:02,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:50:02,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:50:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-11-13 23:50:02,208 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2024-11-13 23:50:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:03,179 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-11-13 23:50:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:50:03,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 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 46 [2024-11-13 23:50:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:03,180 INFO L225 Difference]: With dead ends: 64 [2024-11-13 23:50:03,180 INFO L226 Difference]: Without dead ends: 64 [2024-11-13 23:50:03,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 23:50:03,181 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:03,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 61 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 23:50:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-13 23:50:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-13 23:50:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 63 states have internal predecessors, (65), 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) [2024-11-13 23:50:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-11-13 23:50:03,184 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 46 [2024-11-13 23:50:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:03,184 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-11-13 23:50:03,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2024-11-13 23:50:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-11-13 23:50:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 23:50:03,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:03,185 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:03,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 23:50:03,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 23:50:03,386 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:50:03,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1365572305, now seen corresponding path program 1 times [2024-11-13 23:50:03,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:03,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889315817] [2024-11-13 23:50:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:10,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:10,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889315817] [2024-11-13 23:50:10,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889315817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:10,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313711479] [2024-11-13 23:50:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:10,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:10,727 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:10,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 23:50:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:11,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-13 23:50:11,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:11,102 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 23:50:11,102 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 40 treesize of output 34 [2024-11-13 23:50:11,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 23:50:11,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-13 23:50:11,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2024-11-13 23:50:11,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 23:50:11,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 35 [2024-11-13 23:50:11,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 23:50:11,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2024-11-13 23:50:12,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 23:50:12,124 INFO L349 Elim1Store]: treesize reduction 78, result has 17.0 percent of original size [2024-11-13 23:50:12,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 76 [2024-11-13 23:50:12,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 69 [2024-11-13 23:50:13,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 7 [2024-11-13 23:50:13,782 INFO L349 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2024-11-13 23:50:13,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 379 treesize of output 206 [2024-11-13 23:50:13,793 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:50:13,794 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:50:13,813 INFO L349 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2024-11-13 23:50:13,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 43 [2024-11-13 23:50:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:50:13,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:50:13,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313711479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:13,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:50:13,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [20] total 33 [2024-11-13 23:50:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898370568] [2024-11-13 23:50:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:13,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 23:50:13,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 23:50:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 23:50:13,971 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2024-11-13 23:50:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:14,963 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-11-13 23:50:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 23:50:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 46 [2024-11-13 23:50:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:14,964 INFO L225 Difference]: With dead ends: 63 [2024-11-13 23:50:14,964 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 23:50:14,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 23:50:14,965 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:14,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:50:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 23:50:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-13 23:50:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 62 states have internal predecessors, (64), 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) [2024-11-13 23:50:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-11-13 23:50:14,968 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 46 [2024-11-13 23:50:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:14,968 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-11-13 23:50:14,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2024-11-13 23:50:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-11-13 23:50:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 23:50:14,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:14,969 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:14,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 23:50:15,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 23:50:15,170 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:50:15,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash 165701565, now seen corresponding path program 1 times [2024-11-13 23:50:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:15,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952571775] [2024-11-13 23:50:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:50:15,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:15,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952571775] [2024-11-13 23:50:15,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952571775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:15,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:15,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:50:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216638325] [2024-11-13 23:50:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:15,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:50:15,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:15,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:50:15,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:50:15,283 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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) [2024-11-13 23:50:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:15,341 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2024-11-13 23:50:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:50:15,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 49 [2024-11-13 23:50:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:15,342 INFO L225 Difference]: With dead ends: 62 [2024-11-13 23:50:15,342 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 23:50:15,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:15,343 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:15,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 23:50:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-13 23:50:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 61 states have internal predecessors, (63), 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) [2024-11-13 23:50:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2024-11-13 23:50:15,345 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 49 [2024-11-13 23:50:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:15,346 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2024-11-13 23:50:15,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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) [2024-11-13 23:50:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2024-11-13 23:50:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 23:50:15,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:15,347 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:15,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-13 23:50:15,347 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:50:15,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash 165701566, now seen corresponding path program 1 times [2024-11-13 23:50:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126955118] [2024-11-13 23:50:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:50:15,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:15,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126955118] [2024-11-13 23:50:15,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126955118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:15,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:15,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:50:15,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230599344] [2024-11-13 23:50:15,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:15,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:50:15,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:50:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:15,517 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-11-13 23:50:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:15,570 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-11-13 23:50:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:50:15,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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 49 [2024-11-13 23:50:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:15,571 INFO L225 Difference]: With dead ends: 61 [2024-11-13 23:50:15,571 INFO L226 Difference]: Without dead ends: 61 [2024-11-13 23:50:15,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:15,572 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:15,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-13 23:50:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-13 23:50:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 60 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) [2024-11-13 23:50:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-13 23:50:15,574 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 49 [2024-11-13 23:50:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:15,574 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-13 23:50:15,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-11-13 23:50:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-13 23:50:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:50:15,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:15,575 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:15,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-13 23:50:15,576 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:50:15,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash 841781271, now seen corresponding path program 1 times [2024-11-13 23:50:15,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:15,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102422114] [2024-11-13 23:50:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:15,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:50:15,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102422114] [2024-11-13 23:50:15,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102422114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:15,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:50:15,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:50:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158429732] [2024-11-13 23:50:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:15,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:50:15,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:50:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:50:15,746 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2024-11-13 23:50:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:15,828 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-11-13 23:50:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:50:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) Word has length 50 [2024-11-13 23:50:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:15,829 INFO L225 Difference]: With dead ends: 60 [2024-11-13 23:50:15,829 INFO L226 Difference]: Without dead ends: 60 [2024-11-13 23:50:15,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:50:15,830 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:15,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-13 23:50:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-13 23:50:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 59 states have internal predecessors, (61), 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) [2024-11-13 23:50:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-13 23:50:15,832 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 50 [2024-11-13 23:50:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:15,833 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-13 23:50:15,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2024-11-13 23:50:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-13 23:50:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:50:15,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:15,834 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:15,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-13 23:50:15,834 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:50:15,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 841781272, now seen corresponding path program 1 times [2024-11-13 23:50:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:15,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871084193] [2024-11-13 23:50:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:15,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:50:26,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871084193] [2024-11-13 23:50:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871084193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134582446] [2024-11-13 23:50:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:26,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:26,507 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:26,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 23:50:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:26,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-13 23:50:26,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:26,980 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 23:50:26,981 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 165 treesize of output 157 [2024-11-13 23:50:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:27,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:27,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:27,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:27,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:50:27,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 23:50:27,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 36 [2024-11-13 23:50:27,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2024-11-13 23:50:28,082 INFO L349 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2024-11-13 23:50:28,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 60 [2024-11-13 23:50:28,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2024-11-13 23:50:29,111 INFO L349 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2024-11-13 23:50:29,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 75 [2024-11-13 23:50:29,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2024-11-13 23:50:29,282 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 21 treesize of output 9 [2024-11-13 23:50:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:50:29,346 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:50:29,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134582446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:50:29,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:50:29,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [24] total 35 [2024-11-13 23:50:29,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848775035] [2024-11-13 23:50:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:50:29,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 23:50:29,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 23:50:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 23:50:29,348 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2024-11-13 23:50:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:30,115 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2024-11-13 23:50:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 23:50:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) Word has length 50 [2024-11-13 23:50:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:30,116 INFO L225 Difference]: With dead ends: 62 [2024-11-13 23:50:30,116 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 23:50:30,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 23:50:30,117 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:30,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:50:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 23:50:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-13 23:50:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.125) internal successors, (63), 61 states have internal predecessors, (63), 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) [2024-11-13 23:50:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2024-11-13 23:50:30,119 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 50 [2024-11-13 23:50:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:30,119 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2024-11-13 23:50:30,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2024-11-13 23:50:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2024-11-13 23:50:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 23:50:30,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:30,120 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:30,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 23:50:30,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 23:50:30,321 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:50:30,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1544838545, now seen corresponding path program 1 times [2024-11-13 23:50:30,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:30,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919027260] [2024-11-13 23:50:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:30,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:41,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919027260] [2024-11-13 23:50:41,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919027260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628730366] [2024-11-13 23:50:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:41,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:41,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:41,733 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:41,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 23:50:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:42,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-13 23:50:42,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:42,173 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 23:50:42,173 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 148 treesize of output 140 [2024-11-13 23:50:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:42,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:50:42,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 23:50:43,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:50:43,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 36 [2024-11-13 23:50:43,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2024-11-13 23:50:43,281 INFO L349 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2024-11-13 23:50:43,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 60 [2024-11-13 23:50:43,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2024-11-13 23:50:44,314 INFO L349 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2024-11-13 23:50:44,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 75 [2024-11-13 23:50:44,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2024-11-13 23:50:44,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 21 treesize of output 9 [2024-11-13 23:50:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:50:44,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:44,923 INFO L349 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2024-11-13 23:50:44,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 15 [2024-11-13 23:50:46,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:50:46,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67961 treesize of output 60025 [2024-11-13 23:51:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:51:04,338 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 23:51:04,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 17848 treesize of output 1 [2024-11-13 23:51:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-13 23:51:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628730366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:51:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1509877633] [2024-11-13 23:51:04,691 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-13 23:51:04,692 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:51:04,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:51:04,692 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:51:04,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:51:09,515 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:52:06,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6457#(and (<= 1 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~pa~0#1.base|) 1) (exists ((|v_ULTIMATE.start_check_~i#1_16| Int)) (and (or (< (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#cont~0#1.base|) 0) (* |v_ULTIMATE.start_check_~i#1_16| 4)) 0) (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#cont~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#cont~0#1.base|) 0) (* |v_ULTIMATE.start_check_~i#1_16| 4) 4))) (<= (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |v_ULTIMATE.start_check_~i#1_16|))) (<= 2 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 2 |ULTIMATE.start_main_~#cont~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (<= (+ 4 |ULTIMATE.start_main_~pa~0#1.offset|) (select |#length| |ULTIMATE.start_main_~pa~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~#cont~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~#cont~0#1.base|)) (<= 0 |ULTIMATE.start_main_~pa~0#1.offset|))' at error location [2024-11-13 23:52:06,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:52:06,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:52:06,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13, 13] total 52 [2024-11-13 23:52:06,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38216962] [2024-11-13 23:52:06,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:52:06,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 23:52:06,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:52:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 23:52:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=5265, Unknown=18, NotChecked=0, Total=5550 [2024-11-13 23:52:06,447 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 53 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 52 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) [2024-11-13 23:52:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:52:14,142 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-11-13 23:52:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 23:52:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 52 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) Word has length 52 [2024-11-13 23:52:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:52:14,143 INFO L225 Difference]: With dead ends: 70 [2024-11-13 23:52:14,143 INFO L226 Difference]: Without dead ends: 70 [2024-11-13 23:52:14,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2704 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=616, Invalid=9872, Unknown=18, NotChecked=0, Total=10506 [2024-11-13 23:52:14,146 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:52:14,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 224 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 23:52:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-13 23:52:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-13 23:52:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.109375) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:52:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-13 23:52:14,148 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 52 [2024-11-13 23:52:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:52:14,148 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-13 23:52:14,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 52 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) [2024-11-13 23:52:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-13 23:52:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 23:52:14,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:52:14,149 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:52:14,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 23:52:14,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:52:14,350 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-13 23:52:14,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:52:14,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1278242037, now seen corresponding path program 2 times [2024-11-13 23:52:14,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:52:14,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534990079] [2024-11-13 23:52:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:14,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:52:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 108 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:52:25,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:52:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534990079] [2024-11-13 23:52:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534990079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:52:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627439498] [2024-11-13 23:52:25,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:52:25,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:52:25,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:52:25,149 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:52:25,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 23:52:25,666 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:52:25,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:52:25,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-13 23:52:25,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:52:25,700 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 23:52:25,701 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 40 treesize of output 34 [2024-11-13 23:52:27,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 23:52:27,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-13 23:52:27,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 23:52:27,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2024-11-13 23:52:27,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 23:52:27,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2024-11-13 23:52:27,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2024-11-13 23:52:27,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 23:52:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:52:27,756 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 23:52:27,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 58 [2024-11-13 23:52:27,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2024-11-13 23:52:32,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 13 [2024-11-13 23:52:33,181 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:52:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:52:33,188 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 23:52:33,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 165 [2024-11-13 23:52:33,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:52:33,227 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:52:33,228 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:52:33,249 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-13 23:52:33,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 47 [2024-11-13 23:52:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-11-13 23:52:33,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:52:36,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:52:36,279 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 148 treesize of output 152 [2024-11-13 23:52:38,260 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse15 (+ .cse6 |c_ULTIMATE.start_main_~#dummies~0#1.offset| 4))) (let ((.cse17 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#dummies~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse15 |c_ULTIMATE.start_main_~#dummy~0#1.offset|))) (.cse16 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#dummies~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse15 |c_ULTIMATE.start_main_~#dummy~0#1.base|)))) (let ((.cse7 (store (select .cse16 |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| |c_ULTIMATE.start_main_~#dummies~0#1.base|)) (.cse5 (store (select .cse17 |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| (+ |c_ULTIMATE.start_main_~#dummies~0#1.offset| 4)))) (let ((.cse11 (store .cse17 |c_ULTIMATE.start_main_~#cont~0#1.base| .cse5)) (.cse14 (store .cse16 |c_ULTIMATE.start_main_~#cont~0#1.base| .cse7))) (let ((.cse12 (select (select .cse14 |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse15)) (.cse13 (select (select .cse11 |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse15))) (let ((.cse2 (+ .cse6 |c_ULTIMATE.start_main_~#a~0#1.offset|)) (.cse3 (select (select .cse14 .cse12) .cse13)) (.cse4 (+ (select (select .cse11 .cse12) .cse13) 4))) (and (forall ((v_ArrVal_5300 (Array Int Int)) (v_ArrVal_5304 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#dummies~0#1.base| v_ArrVal_5300))) (let ((.cse1 (store .cse0 |c_ULTIMATE.start_main_~#cont~0#1.base| v_ArrVal_5304))) (or (not (= (store (select .cse0 |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| (select v_ArrVal_5304 |c_ULTIMATE.start_main_~#cont~0#1.offset|)) v_ArrVal_5304)) (< (select (select .cse1 |c_ULTIMATE.start_main_~#a~0#1.base|) .cse2) 1) (forall ((v_prenex_1 Int)) (or (< v_prenex_1 0) (< (+ (* 4 (select (select .cse1 .cse3) .cse4)) (select .cse5 v_prenex_1)) (+ 5 .cse6 |c_ULTIMATE.start_main_~#dummies~0#1.offset|)) (< |c_ULTIMATE.start_main_~#cont~0#1.offset| v_prenex_1))))))) (or (forall ((v_prenex_1 Int)) (or (< v_prenex_1 0) (< |c_ULTIMATE.start_main_~#cont~0#1.offset| v_prenex_1) (= |c_ULTIMATE.start_main_~#dummies~0#1.base| (select .cse7 v_prenex_1)))) (forall ((v_ArrVal_5300 (Array Int Int)) (v_ArrVal_5304 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#dummies~0#1.base| v_ArrVal_5300))) (or (not (= (store (select .cse8 |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| (select v_ArrVal_5304 |c_ULTIMATE.start_main_~#cont~0#1.offset|)) v_ArrVal_5304)) (< (select (select (store .cse8 |c_ULTIMATE.start_main_~#cont~0#1.base| v_ArrVal_5304) |c_ULTIMATE.start_main_~#a~0#1.base|) .cse2) 1))))) (forall ((v_ArrVal_5300 (Array Int Int)) (v_ArrVal_5304 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#dummies~0#1.base| v_ArrVal_5300))) (let ((.cse10 (store .cse9 |c_ULTIMATE.start_main_~#cont~0#1.base| v_ArrVal_5304))) (or (not (= (store (select .cse9 |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| (select v_ArrVal_5304 |c_ULTIMATE.start_main_~#cont~0#1.offset|)) v_ArrVal_5304)) (< (select (select .cse10 |c_ULTIMATE.start_main_~#a~0#1.base|) .cse2) 1) (forall ((|v_ULTIMATE.start_check_~pc#1.offset_13| Int)) (or (< 0 (+ (* 4 (select (select .cse10 .cse3) .cse4)) (select .cse5 |v_ULTIMATE.start_check_~pc#1.offset_13|) 1)) (< |c_ULTIMATE.start_main_~#cont~0#1.offset| |v_ULTIMATE.start_check_~pc#1.offset_13|) (< |v_ULTIMATE.start_check_~pc#1.offset_13| 0))))))))))))))) is different from false [2024-11-13 23:52:38,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:52:38,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11349 treesize of output 11054 [2024-11-13 23:52:39,060 INFO L349 Elim1Store]: treesize reduction 178, result has 41.3 percent of original size [2024-11-13 23:52:39,062 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 4 new quantified variables, introduced 8 case distinctions, treesize of input 62477 treesize of output 36041 [2024-11-13 23:52:39,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:52:39,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3837 treesize of output 3711 [2024-11-13 23:52:39,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:52:39,686 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 28 treesize of output 32 [2024-11-13 23:52:40,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:52:40,319 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 52 treesize of output 70 [2024-11-13 23:52:40,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:52:40,825 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 81 treesize of output 97 [2024-11-14 00:00:25,093 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-14 00:00:25,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2024-11-14 00:00:25,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-14 00:00:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1367478244] [2024-11-14 00:00:25,096 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 00:00:25,096 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 00:00:25,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 00:00:25,096 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 00:00:25,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 00:00:25,102 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-14 00:00:25,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 00:00:25,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2024-11-14 00:00:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732442748] [2024-11-14 00:00:25,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 00:00:25,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 00:00:25,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 00:00:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 00:00:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4148, Unknown=8, NotChecked=130, Total=4556 [2024-11-14 00:00:25,107 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 35 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 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 00:00:25,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=270, Invalid=4148, Unknown=8, NotChecked=130, Total=4556 [2024-11-14 00:00:25,110 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:25,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 00:00:25,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 00:00:25,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:25,315 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:447) at java.base/java.io.OutputStream.write(OutputStream.java:167) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:125) at java.base/java.io.BufferedOutputStream.implFlush(BufferedOutputStream.java:252) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:246) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:412) at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:214) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:201) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:262) at java.base/java.io.BufferedWriter.implFlush(BufferedWriter.java:372) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:359) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2024-11-14 00:00:25,318 INFO L158 Benchmark]: Toolchain (without parser) took 683930.04ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 92.8MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 313.7MB. Max. memory is 16.1GB. [2024-11-14 00:00:25,318 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 00:00:25,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.24ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 81.2MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 00:00:25,319 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.45ms. Allocated memory is still 117.4MB. Free memory was 81.2MB in the beginning and 79.6MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 00:00:25,319 INFO L158 Benchmark]: Boogie Preprocessor took 30.30ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 78.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 00:00:25,319 INFO L158 Benchmark]: RCFGBuilder took 757.25ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 55.7MB in the end (delta: 22.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 00:00:25,319 INFO L158 Benchmark]: TraceAbstraction took 682796.43ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 55.2MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 280.1MB. Max. memory is 16.1GB. [2024-11-14 00:00:25,321 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.24ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 81.2MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.45ms. Allocated memory is still 117.4MB. Free memory was 81.2MB in the beginning and 79.6MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.30ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 78.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 757.25ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 55.7MB in the end (delta: 22.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 682796.43ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 55.2MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 280.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/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_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test27-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78863f43fa37191b47f0d738bb1bc2018c82b38cb68dad85c455cdbd7fd69aa4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 00:00:27,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 00:00:27,838 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2024-11-14 00:00:27,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 00:00:27,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 00:00:27,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 00:00:27,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 00:00:27,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 00:00:27,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 00:00:27,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 00:00:27,893 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 00:00:27,893 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 00:00:27,893 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 00:00:27,893 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 00:00:27,894 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 00:00:27,894 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 00:00:27,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 00:00:27,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 00:00:27,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 00:00:27,894 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 00:00:27,897 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 00:00:27,897 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 00:00:27,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 00:00:27,897 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 00:00:27,897 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 00:00:27,898 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 00:00:27,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 00:00:27,898 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 00:00:27,898 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-14 00:00:27,898 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 00:00:27,898 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-14 00:00:27,899 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 00:00:27,899 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 00:00:27,899 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 00:00:27,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 00:00:27,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-14 00:00:27,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 00:00:27,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 00:00:27,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 00:00:27,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 00:00:27,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 00:00:27,901 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-14 00:00:27,901 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:27,901 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 00:00:27,901 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 00:00:27,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_81baa6c9-2d05-4cca-ab90-357e42838004/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 78863f43fa37191b47f0d738bb1bc2018c82b38cb68dad85c455cdbd7fd69aa4 [2024-11-14 00:00:28,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 00:00:28,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 00:00:28,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 00:00:28,246 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 00:00:28,247 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 00:00:28,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-regression/test27-1.c Unable to find full path for "g++" [2024-11-14 00:00:30,253 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 00:00:30,578 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 00:00:30,579 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/sv-benchmarks/c/ldv-regression/test27-1.c [2024-11-14 00:00:30,589 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data/9feed62f6/f8d4c4d1ad0043edaf79da7f1be12a13/FLAGce7307e94 [2024-11-14 00:00:30,616 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/data/9feed62f6/f8d4c4d1ad0043edaf79da7f1be12a13 [2024-11-14 00:00:30,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 00:00:30,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 00:00:30,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 00:00:30,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 00:00:30,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 00:00:30,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:30,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32608185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30, skipping insertion in model container [2024-11-14 00:00:30,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:30,652 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 00:00:30,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 00:00:30,873 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 00:00:30,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 00:00:30,929 INFO L204 MainTranslator]: Completed translation [2024-11-14 00:00:30,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30 WrapperNode [2024-11-14 00:00:30,931 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 00:00:30,932 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 00:00:30,932 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 00:00:30,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 00:00:30,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:30,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:30,989 INFO L138 Inliner]: procedures = 18, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 115 [2024-11-14 00:00:30,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 00:00:30,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 00:00:30,991 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 00:00:30,991 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 00:00:30,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:30,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,003 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,025 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,036 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 00:00:31,037 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 00:00:31,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 00:00:31,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 00:00:31,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (1/1) ... [2024-11-14 00:00:31,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 00:00:31,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:00:31,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 00:00:31,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 00:00:31,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 00:00:31,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 00:00:31,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-14 00:00:31,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 00:00:31,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 00:00:31,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2024-11-14 00:00:31,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 00:00:31,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 00:00:31,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 00:00:31,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2024-11-14 00:00:31,198 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 00:00:31,200 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 00:00:31,794 INFO L? ?]: Removed 96 outVars from TransFormulas that were not future-live. [2024-11-14 00:00:31,794 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 00:00:31,809 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 00:00:31,809 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 00:00:31,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 12:00:31 BoogieIcfgContainer [2024-11-14 00:00:31,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 00:00:31,813 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 00:00:31,813 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 00:00:31,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 00:00:31,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 12:00:30" (1/3) ... [2024-11-14 00:00:31,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a778040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 12:00:31, skipping insertion in model container [2024-11-14 00:00:31,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 12:00:30" (2/3) ... [2024-11-14 00:00:31,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a778040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 12:00:31, skipping insertion in model container [2024-11-14 00:00:31,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 12:00:31" (3/3) ... [2024-11-14 00:00:31,820 INFO L112 eAbstractionObserver]: Analyzing ICFG test27-1.c [2024-11-14 00:00:31,836 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 00:00:31,837 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG test27-1.c that has 1 procedures, 78 locations, 1 initial locations, 2 loop locations, and 38 error locations. [2024-11-14 00:00:31,875 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 00:00:31,895 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=None, 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;@58cdf66c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 00:00:31,897 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-14 00:00:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 77 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 00:00:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 00:00:31,908 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:31,909 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 00:00:31,910 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:31,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:31,916 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2024-11-14 00:00:31,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:31,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306331205] [2024-11-14 00:00:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:31,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:31,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:31,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:31,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-14 00:00:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:32,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 00:00:32,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:32,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2024-11-14 00:00:32,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:32,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:32,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:32,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:32,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:32,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:32,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:32,609 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 00:00:32,609 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 00:00:32,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:32,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306331205] [2024-11-14 00:00:32,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306331205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 00:00:32,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 00:00:32,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 00:00:32,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27514913] [2024-11-14 00:00:32,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 00:00:32,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 00:00:32,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 00:00:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 00:00:32,642 INFO L87 Difference]: Start difference. First operand has 78 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 77 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:32,852 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2024-11-14 00:00:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 00:00:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 00:00:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:32,861 INFO L225 Difference]: With dead ends: 74 [2024-11-14 00:00:32,861 INFO L226 Difference]: Without dead ends: 72 [2024-11-14 00:00:32,862 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 00:00:32,868 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:32,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 41 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 00:00:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-14 00:00:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-14 00:00:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 37 states have (on average 2.027027027027027) internal successors, (75), 71 states have internal predecessors, (75), 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 00:00:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2024-11-14 00:00:32,909 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 4 [2024-11-14 00:00:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:32,910 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2024-11-14 00:00:32,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2024-11-14 00:00:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 00:00:32,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:32,911 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 00:00:32,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-14 00:00:33,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:33,113 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:33,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2024-11-14 00:00:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:33,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487979350] [2024-11-14 00:00:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:33,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:33,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:33,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:33,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-14 00:00:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:33,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 00:00:33,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:33,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 00:00:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:33,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:33,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:33,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:33,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:33,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:33,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:33,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:33,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:33,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:33,601 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 00:00:33,601 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 00:00:33,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487979350] [2024-11-14 00:00:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487979350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 00:00:33,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 00:00:33,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 00:00:33,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588204969] [2024-11-14 00:00:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 00:00:33,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 00:00:33,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 00:00:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 00:00:33,604 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:33,852 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2024-11-14 00:00:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 00:00:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 00:00:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:33,854 INFO L225 Difference]: With dead ends: 78 [2024-11-14 00:00:33,854 INFO L226 Difference]: Without dead ends: 78 [2024-11-14 00:00:33,855 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 00:00:33,855 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:33,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 102 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 00:00:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-14 00:00:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2024-11-14 00:00:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 73 states have internal predecessors, (77), 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 00:00:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2024-11-14 00:00:33,861 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 4 [2024-11-14 00:00:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:33,862 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2024-11-14 00:00:33,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2024-11-14 00:00:33,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 00:00:33,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:33,862 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 00:00:33,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-14 00:00:34,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:34,066 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:34,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash 889659654, now seen corresponding path program 1 times [2024-11-14 00:00:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:34,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522889472] [2024-11-14 00:00:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:34,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:34,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:34,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:34,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-14 00:00:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:34,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 00:00:34,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:34,173 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2024-11-14 00:00:34,208 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2024-11-14 00:00:34,233 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2024-11-14 00:00:34,262 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2024-11-14 00:00:34,302 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2024-11-14 00:00:34,328 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2024-11-14 00:00:34,367 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2024-11-14 00:00:34,409 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2024-11-14 00:00:34,453 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2024-11-14 00:00:34,485 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2024-11-14 00:00:34,523 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2024-11-14 00:00:34,553 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-14 00:00:34,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2024-11-14 00:00:34,739 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 00:00:34,739 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 00:00:34,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:34,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522889472] [2024-11-14 00:00:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522889472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 00:00:34,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 00:00:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 00:00:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210583248] [2024-11-14 00:00:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 00:00:34,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 00:00:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 00:00:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 00:00:34,744 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:34,954 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2024-11-14 00:00:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 00:00:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 00:00:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:34,955 INFO L225 Difference]: With dead ends: 71 [2024-11-14 00:00:34,955 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 00:00:34,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 00:00:34,956 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:34,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 38 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 00:00:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 00:00:34,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-14 00:00:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 70 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 00:00:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2024-11-14 00:00:34,964 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 6 [2024-11-14 00:00:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:34,965 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2024-11-14 00:00:34,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2024-11-14 00:00:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 00:00:34,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:34,966 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 00:00:34,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-14 00:00:35,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:35,167 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:35,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:35,167 INFO L85 PathProgramCache]: Analyzing trace with hash 889659655, now seen corresponding path program 1 times [2024-11-14 00:00:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:35,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027528411] [2024-11-14 00:00:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:35,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:35,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:35,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:35,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-14 00:00:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:35,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 00:00:35,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:35,281 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:35,321 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:35,355 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:35,391 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:35,429 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:35,458 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:35,500 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:35,532 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:35,562 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:35,614 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:35,653 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:35,699 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:35,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 00:00:35,950 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 00:00:35,950 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 00:00:35,951 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027528411] [2024-11-14 00:00:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027528411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 00:00:35,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 00:00:35,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 00:00:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748123981] [2024-11-14 00:00:35,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 00:00:35,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 00:00:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 00:00:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 00:00:35,952 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:36,288 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2024-11-14 00:00:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 00:00:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 00:00:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:36,289 INFO L225 Difference]: With dead ends: 74 [2024-11-14 00:00:36,289 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 00:00:36,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 00:00:36,290 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:36,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 00:00:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 00:00:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-14 00:00:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.853658536585366) internal successors, (76), 72 states have internal predecessors, (76), 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 00:00:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-11-14 00:00:36,297 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 6 [2024-11-14 00:00:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:36,297 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-11-14 00:00:36,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-11-14 00:00:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 00:00:36,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:36,298 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 00:00:36,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-14 00:00:36,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:36,499 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:36,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:36,499 INFO L85 PathProgramCache]: Analyzing trace with hash -392443472, now seen corresponding path program 1 times [2024-11-14 00:00:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:36,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454653444] [2024-11-14 00:00:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:36,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:36,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:36,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-14 00:00:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:36,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 00:00:36,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:36,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 00:00:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:36,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:36,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:36,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:36,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:36,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:36,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:36,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:37,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:37,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454653444] [2024-11-14 00:00:37,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454653444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492789769] [2024-11-14 00:00:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:37,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 00:00:37,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 00:00:37,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-14 00:00:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:37,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 00:00:37,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:37,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 00:00:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:37,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:37,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:37,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:37,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:37,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:37,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:38,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492789769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973068938] [2024-11-14 00:00:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:38,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:38,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:00:38,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:00:38,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 00:00:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:38,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 00:00:38,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:38,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-14 00:00:38,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:38,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:38,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:38,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:38,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:38,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:38,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973068938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:38,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 00:00:38,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2024-11-14 00:00:38,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330380496] [2024-11-14 00:00:38,706 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 00:00:38,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 00:00:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 00:00:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 00:00:38,708 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 00:00:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:39,461 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2024-11-14 00:00:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 00:00:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 9 [2024-11-14 00:00:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:39,466 INFO L225 Difference]: With dead ends: 86 [2024-11-14 00:00:39,466 INFO L226 Difference]: Without dead ends: 86 [2024-11-14 00:00:39,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-14 00:00:39,467 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:39,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 00:00:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-14 00:00:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-14 00:00:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 85 states have internal predecessors, (93), 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 00:00:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2024-11-14 00:00:39,483 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 9 [2024-11-14 00:00:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:39,483 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2024-11-14 00:00:39,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 00:00:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2024-11-14 00:00:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 00:00:39,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:39,484 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 00:00:39,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-14 00:00:39,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-14 00:00:39,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 00:00:40,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:40,085 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:40,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash 818943985, now seen corresponding path program 1 times [2024-11-14 00:00:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:40,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590075104] [2024-11-14 00:00:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:40,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:40,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:40,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:40,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-14 00:00:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:40,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 00:00:40,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:40,213 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:40,238 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:40,268 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:40,313 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:40,356 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 00:00:40,393 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:40,420 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:40,452 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:40,477 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:40,513 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:40,539 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:40,566 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:40,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:40,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:41,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590075104] [2024-11-14 00:00:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590075104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1318544680] [2024-11-14 00:00:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:41,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 00:00:41,209 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 00:00:41,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-14 00:00:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:41,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 00:00:41,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-14 00:00:41,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:41,431 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:41,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:41,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,506 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:41,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,515 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:41,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:41,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:41,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1318544680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309636982] [2024-11-14 00:00:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:41,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:41,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:00:41,813 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:00:41,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 00:00:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:41,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 00:00:41,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:41,932 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:41,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:41,957 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:41,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:00:41,991 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:41,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:00:42,009 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:00:42,037 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:00:42,055 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:00:42,077 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:00:42,103 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:00:42,121 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:00:42,155 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:00:42,186 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:00:42,224 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:00:42,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2024-11-14 00:00:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:42,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:43,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309636982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:43,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 00:00:43,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 4, 5] total 12 [2024-11-14 00:00:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508317490] [2024-11-14 00:00:43,266 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 00:00:43,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 00:00:43,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 00:00:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2024-11-14 00:00:43,267 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 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 00:00:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:44,401 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-11-14 00:00:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 00:00:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 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 11 [2024-11-14 00:00:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:44,403 INFO L225 Difference]: With dead ends: 88 [2024-11-14 00:00:44,403 INFO L226 Difference]: Without dead ends: 88 [2024-11-14 00:00:44,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2024-11-14 00:00:44,404 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 8 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:44,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 186 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 00:00:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-14 00:00:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-14 00:00:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 87 states have internal predecessors, (93), 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 00:00:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2024-11-14 00:00:44,410 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 11 [2024-11-14 00:00:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:44,410 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2024-11-14 00:00:44,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 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 00:00:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2024-11-14 00:00:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 00:00:44,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:44,411 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 00:00:44,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-11-14 00:00:44,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 00:00:44,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-14 00:00:45,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:45,014 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:45,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1451350732, now seen corresponding path program 1 times [2024-11-14 00:00:45,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:45,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249525284] [2024-11-14 00:00:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:45,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:45,017 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:45,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-11-14 00:00:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:45,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 00:00:45,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:45,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:45,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249525284] [2024-11-14 00:00:45,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249525284] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1936636335] [2024-11-14 00:00:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:45,227 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:45,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 00:00:45,234 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 00:00:45,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-14 00:00:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:45,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 00:00:45,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:45,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:45,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1936636335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:45,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524986066] [2024-11-14 00:00:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:45,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:45,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:00:45,477 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:00:45,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 00:00:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:45,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 00:00:45,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:45,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-14 00:00:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:45,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:45,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:45,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:45,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:45,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:45,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:45,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:45,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:46,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524986066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:46,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 00:00:46,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 7] total 13 [2024-11-14 00:00:46,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425001944] [2024-11-14 00:00:46,351 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 00:00:46,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 00:00:46,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:46,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 00:00:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-11-14 00:00:46,353 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:47,025 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2024-11-14 00:00:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 00:00:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 00:00:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:47,027 INFO L225 Difference]: With dead ends: 95 [2024-11-14 00:00:47,027 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 00:00:47,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2024-11-14 00:00:47,028 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 19 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:47,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 319 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 00:00:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 00:00:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-14 00:00:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 63 states have (on average 1.5873015873015872) internal successors, (100), 94 states have internal predecessors, (100), 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 00:00:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2024-11-14 00:00:47,034 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 16 [2024-11-14 00:00:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:47,035 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2024-11-14 00:00:47,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2024-11-14 00:00:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 00:00:47,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:47,035 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1] [2024-11-14 00:00:47,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-11-14 00:00:47,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 00:00:47,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-14 00:00:47,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:47,636 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:47,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1656943814, now seen corresponding path program 2 times [2024-11-14 00:00:47,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:47,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215330372] [2024-11-14 00:00:47,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 00:00:47,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:47,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:47,639 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:47,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-14 00:00:47,765 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 00:00:47,765 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:00:47,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 00:00:47,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:47,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 00:00:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:47,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:47,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:47,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:47,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:47,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:48,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:48,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:48,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:48,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:48,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:49,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:49,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215330372] [2024-11-14 00:00:49,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215330372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:49,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338263992] [2024-11-14 00:00:49,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 00:00:49,156 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:49,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 00:00:49,158 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 00:00:49,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2024-11-14 00:00:49,392 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 00:00:49,392 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:00:49,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 00:00:49,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:49,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 00:00:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:49,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:49,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:49,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:49,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:49,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:49,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:49,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:49,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:49,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:49,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:50,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338263992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:50,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526294187] [2024-11-14 00:00:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 00:00:50,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:00:50,677 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:00:50,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 00:00:50,811 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-14 00:00:50,812 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:00:50,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 00:00:50,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:50,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 00:00:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:50,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:50,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:50,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:50,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:50,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:50,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:50,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:50,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:50,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:00:51,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:51,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:00:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:00:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:51,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:00:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:51,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:52,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526294187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:52,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 00:00:52,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 6, 6, 7] total 20 [2024-11-14 00:00:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244412184] [2024-11-14 00:00:52,452 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 00:00:52,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 00:00:52,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:00:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 00:00:52,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2024-11-14 00:00:52,454 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 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 00:00:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:55,730 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2024-11-14 00:00:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 00:00:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 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 00:00:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:55,734 INFO L225 Difference]: With dead ends: 116 [2024-11-14 00:00:55,734 INFO L226 Difference]: Without dead ends: 116 [2024-11-14 00:00:55,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2024-11-14 00:00:55,735 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 39 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:55,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 379 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 00:00:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-14 00:00:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-11-14 00:00:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 115 states have internal predecessors, (128), 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 00:00:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2024-11-14 00:00:55,743 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 24 [2024-11-14 00:00:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:55,744 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2024-11-14 00:00:55,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 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 00:00:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2024-11-14 00:00:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 00:00:55,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:55,745 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1] [2024-11-14 00:00:55,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-11-14 00:00:55,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2024-11-14 00:00:56,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 00:00:56,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:56,346 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:00:56,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:56,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1109863033, now seen corresponding path program 2 times [2024-11-14 00:00:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:00:56,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100739288] [2024-11-14 00:00:56,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 00:00:56,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:00:56,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:00:56,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:00:56,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-11-14 00:00:56,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-14 00:00:56,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:00:56,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 00:00:56,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:56,471 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:00:56,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:56,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:56,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,507 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:56,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,523 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:56,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,530 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:56,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,538 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:56,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-14 00:00:56,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:56,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:56,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,609 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:56,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-14 00:00:56,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:56,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:56,676 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 00:00:57,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 00:00:58,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:00:58,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100739288] [2024-11-14 00:00:58,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100739288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:58,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1846934037] [2024-11-14 00:00:58,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 00:00:58,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 00:00:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 00:00:58,616 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 00:00:58,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-14 00:00:58,790 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-14 00:00:58,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:00:58,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 00:00:58,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:58,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:00:58,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:58,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:58,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-14 00:00:58,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:58,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:58,914 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:58,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:58,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:58,959 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:58,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:58,967 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:58,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-14 00:00:58,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:58,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:00:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:00:59,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:00:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 00:00:59,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 00:01:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1846934037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:01:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987770671] [2024-11-14 00:01:00,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 00:01:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:01:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:01:00,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:01:00,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 00:01:00,836 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-14 00:01:00,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:01:00,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 00:01:00,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:00,873 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 00:01:00,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-11-14 00:01:00,912 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:00,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:01:00,935 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:00,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:01:00,950 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:00,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:01:00,966 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:00,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:01:00,987 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:00,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:01:01,001 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:01,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:01:01,016 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:01,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:01:01,039 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:01,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:01:01,056 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:01,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:01:01,078 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:01,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-14 00:01:01,093 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-14 00:01:01,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 00:01:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 00:01:01,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 00:01:02,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987770671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:01:02,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 00:01:02,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 7 [2024-11-14 00:01:02,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020496520] [2024-11-14 00:01:02,871 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 00:01:02,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 00:01:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:01:02,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 00:01:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-14 00:01:02,872 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:01:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:01:03,524 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2024-11-14 00:01:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 00:01:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-14 00:01:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:01:03,526 INFO L225 Difference]: With dead ends: 116 [2024-11-14 00:01:03,526 INFO L226 Difference]: Without dead ends: 116 [2024-11-14 00:01:03,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-14 00:01:03,526 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 28 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 00:01:03,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 137 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 00:01:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-14 00:01:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2024-11-14 00:01:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 114 states have internal predecessors, (122), 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 00:01:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2024-11-14 00:01:03,532 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 26 [2024-11-14 00:01:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:01:03,532 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2024-11-14 00:01:03,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:01:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2024-11-14 00:01:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 00:01:03,533 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:01:03,533 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 00:01:03,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2024-11-14 00:01:03,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-11-14 00:01:03,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 00:01:04,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:01:04,134 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:01:04,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:01:04,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1628977588, now seen corresponding path program 2 times [2024-11-14 00:01:04,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:01:04,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229467923] [2024-11-14 00:01:04,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-14 00:01:04,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:01:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:01:04,139 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:01:04,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-11-14 00:01:04,234 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-14 00:01:04,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:01:04,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 00:01:04,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:04,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 00:01:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:04,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:04,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:04,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:04,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:04,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:01:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:04,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:04,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:04,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 00:01:04,670 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 00:01:04,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:01:04,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229467923] [2024-11-14 00:01:04,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229467923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 00:01:04,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 00:01:04,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 00:01:04,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451466035] [2024-11-14 00:01:04,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 00:01:04,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 00:01:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:01:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 00:01:04,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 00:01:04,671 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 00:01:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:01:04,909 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2024-11-14 00:01:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 00:01:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-14 00:01:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:01:04,911 INFO L225 Difference]: With dead ends: 114 [2024-11-14 00:01:04,911 INFO L226 Difference]: Without dead ends: 114 [2024-11-14 00:01:04,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 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 00:01:04,911 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 20 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 00:01:04,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 00:01:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-14 00:01:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2024-11-14 00:01:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.4285714285714286) internal successors, (120), 112 states have internal predecessors, (120), 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 00:01:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2024-11-14 00:01:04,916 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 36 [2024-11-14 00:01:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:01:04,917 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2024-11-14 00:01:04,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 00:01:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2024-11-14 00:01:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 00:01:04,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:01:04,918 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 00:01:04,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2024-11-14 00:01:05,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:01:05,120 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:01:05,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:01:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1041224866, now seen corresponding path program 1 times [2024-11-14 00:01:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:01:05,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063965512] [2024-11-14 00:01:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:01:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:01:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:01:05,123 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:01:05,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-11-14 00:01:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:01:05,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 00:01:05,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:05,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:05,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:01:05,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063965512] [2024-11-14 00:01:05,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063965512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:01:05,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598326585] [2024-11-14 00:01:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:01:05,539 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 00:01:05,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 00:01:05,540 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 00:01:05,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-14 00:01:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:01:05,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 00:01:05,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:05,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:05,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [598326585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:01:05,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276538116] [2024-11-14 00:01:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:01:05,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:01:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:01:05,929 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:01:05,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 00:01:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:01:06,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 00:01:06,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:06,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 00:01:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:06,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:06,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:06,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:06,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:01:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:06,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:06,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:06,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276538116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:01:08,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-14 00:01:08,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 11] total 29 [2024-11-14 00:01:08,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512497232] [2024-11-14 00:01:08,027 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-14 00:01:08,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 00:01:08,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-14 00:01:08,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 00:01:08,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2024-11-14 00:01:08,029 INFO L87 Difference]: Start difference. First operand 113 states and 120 transitions. Second operand has 29 states, 29 states have (on average 4.310344827586207) internal successors, (125), 29 states have internal predecessors, (125), 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 00:01:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:01:12,092 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2024-11-14 00:01:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 00:01:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.310344827586207) internal successors, (125), 29 states have internal predecessors, (125), 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 37 [2024-11-14 00:01:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:01:12,094 INFO L225 Difference]: With dead ends: 132 [2024-11-14 00:01:12,094 INFO L226 Difference]: Without dead ends: 132 [2024-11-14 00:01:12,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 00:01:12,096 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 38 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 00:01:12,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 453 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 00:01:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-14 00:01:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-11-14 00:01:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 131 states have internal predecessors, (139), 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 00:01:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2024-11-14 00:01:12,102 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 37 [2024-11-14 00:01:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:01:12,102 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2024-11-14 00:01:12,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.310344827586207) internal successors, (125), 29 states have internal predecessors, (125), 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 00:01:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2024-11-14 00:01:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 00:01:12,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:01:12,103 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1] [2024-11-14 00:01:12,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 00:01:12,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2024-11-14 00:01:12,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-11-14 00:01:12,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt [2024-11-14 00:01:12,704 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-14 00:01:12,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:01:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1173054586, now seen corresponding path program 3 times [2024-11-14 00:01:12,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-14 00:01:12,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504341219] [2024-11-14 00:01:12,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 00:01:12,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-14 00:01:12,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat [2024-11-14 00:01:12,710 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-14 00:01:12,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2024-11-14 00:01:13,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 00:01:13,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:01:13,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 00:01:13,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:13,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-14 00:01:13,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-11-14 00:01:13,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:13,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-14 00:01:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:13,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-14 00:01:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:13,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-14 00:01:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 10 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:14,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:16,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-14 00:01:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504341219] [2024-11-14 00:01:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504341219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:01:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707339340] [2024-11-14 00:01:16,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 00:01:16,421 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-14 00:01:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 [2024-11-14 00:01:16,425 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-14 00:01:16,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-14 00:01:17,427 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 00:01:17,427 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:01:17,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 00:01:17,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:17,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:01:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:01:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,512 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:01:17,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-14 00:01:17,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:01:17,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:01:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,555 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:01:17,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:01:17,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:01:17,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:01:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:01:17,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2024-11-14 00:01:17,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2024-11-14 00:01:17,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,672 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:01:17,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,683 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:01:17,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2024-11-14 00:01:17,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:17,724 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 00:01:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 10 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:19,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:35,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707339340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:01:35,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310730654] [2024-11-14 00:01:35,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 00:01:35,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:01:35,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:01:35,864 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:01:35,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81baa6c9-2d05-4cca-ab90-357e42838004/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process